I always think it odd shippers get a bad name for the minority who do bad things but if we applied the same to creators, well, we'd all be accused of some awful things, right?
Yeah that's the kind of attitude that I tend to direct towards that video because that is how most people ship. "I love this character they deserve to be happy who do they have the most chemistry with?" And most the time it will be chemistry with a basis (which as has been noted many times is where shounen anime hits a rock with BL because a lot of shounen anime girls might as well just be rocks and the chemistry is all poured, sometimes a little too much, into the best friends and rivals).
Everyone buckle up because I'm about to explain some heavy stuff about how shipping has evolved and modern culture doesn't have nuances anymore. And...
Modern fandoms and creators have lost the original difference between ships for romance and ships as short hand for relationship. The original meaning of a ship was that you were interested in the relationship between them, be it sibling, platonic, romantic or otherwise and that is why there were terms like OTP, BroTP and NOTP, all to denote different forms of relationship. For instance BroTP is your favourite friendSHIP. Unfortunately as fandoms have evolved and terms haven't ship became synonymous with romantic relationships rather than any relationship and "I think it would be interesting to see how these two would interact". The best remaining piece of that sentiment is the crackship, to be honest, saying "these two who've never met could be interesting" as a joke and then by exploring the characters deeper realising that actually they have a lot in common and could work. And honestly, saying people can't ship bad stuff is ridiculous, because that's like saying no one can write about murder because murder is bad. There are nuances. As creators we should be more aware than anyone that there is a place in fiction for exploring the toxic and illegal. And perhaps that is how some people show their love for a character? I love this thing so I will do an in depth character study of them in hard times? I'm sure you love your characters, does that mean you've never done anything awful to them ever? If loving a character means we can't ever put them in unhealthy situations, I think a lot of us really hate our own creations. This also becomes more complicated with the fact that fandoms are now starting to interact world wide, there are different standards for different countries, different practices on how to deal with things and different customs within each section of the fandom for how seriously they take "fiction=reality" vs "it's just fiction chill" and all the area in between. And that not even going into questions like well what if you don't know the characters age but then it comes out they're way older/younger than you thought, or their siblings, or a rather hilarious one I once saw of "well he's just been revealed as the younger brother of the original girl with only 5eps to go, so shipping him with the reincarnation's big brother is incest and everyone who did so for the past 100eps is now retroactively an awful person" type conflicts that have arisen out of fandom policing.
All that was a long ass way of saying that there is no grey area in fandom for anything but "if you ship it you must want them to be endgame" and unfortunately there are some people who do ship things that are problematic without even realizing that (or do and somehow think that's still romantic???) But, as I have said, that's usually not the majority.
And as I said above, anyone who has majorly shipped something for the sake of liking them as a couple rather than wanting to explore something, the sort of thing most people would be happy to call endgame, does usually take into account what canon has given them and does usually come from consideration of what would be best for a character they adore.
I asked a question about a trend I have seen growing in the years I've been in creative group. I wanted it to remain specific, so picked the one that I've seen the most without delving into the regular debate on BL. Would you like me to widen it out to why do some many creators seem to show contempt for their fanbases in general while still trying to keep them sweet because they know they need their support? And again, I feel this sort of attitude is rather sneering and taking into account only bad eggs who make a noise rather than the majority and I've already made my thoughts on that clear. Also the implication that you can't be a shipper and be interesting the plot is rather insulting, don't you think? Or do you think everyone interested in romance between characters has no interest in plot?