Setting aside art styles for the moment, I do read and stick with comics with amateurish art and not just out of pity either. Though I'm not sure if it's a faithful answer to the question in the actual title of this thread, because I'm not sure I can even say I dislike the art in most of those comics. Sure, there are noticeable technical flaws that appear constantly, but there's also usually a certain charm to them; they give off a certain vibe I find appealing, or perhaps I did dislike the art at first but it grew on me.
You feel how you feel, feelings are absolutely not something you need to be ashamed of! :] I do disagree though that amateurish art is correlated with subpar writing ...
I guess the thing is we have vastly different samples on which to base our opinions on comics with amateurish art. Your sample was a react thread, mine is sampled by searching topics I'm interested in and collecting comics that feature such topics. The majority of the hits I find that match my interests have amateurish art, but I tend to find them compelling in terms of writing, and feel like they know what they're talking about.
So I'm most certainly biased, but I suspect react threads may select for slightly lower quality writing as well. This is judgmental of me to say, but I feel like one is more likely to submit to a react thread, especially one with a long waiting list where the OP is struggling to keep up with all the submissions, if one is so lacking in engagement that one would grasp at any opportunity to get some, even if it's a long shot ...
Me? I've seen a number of webcomics with amateurish art but an interesting story and compelling characters. No-one's gonna mention them, because it feels rude to call a small comic creator's art amateurish, even if you're praising their writing. But if you look through my Tapas library and consider the comics that look amateurish, I probably consider that same comic well-written. And yes, I'm subscribed to more comics with skilled art than amateurish art, but sometimes I subscribe to series with good art solely to study their art techniques, and have no real interest in the story. The same can't be said for amateurish-looking comics - I'm always interested in their story.
Though there's certainly a difference between 'amateurish' and 'haphazardly scribbled together'. It's true that I won't consider any of those well-written comics 'haphazardly scribbled together'. Even if the artist is new to the craft and is clearly far from perfecting their skill, they still put a lot of care and attention into the presentation of their work.