Yeah, well... good luck with that :'D note: what I'm gonna talk about strictly refers to Italy and how traditional publishing works here, so it may not really be applicable to people living in the US, but...
I'm a traditionally published author and illustrator. I won a bunch of writing competitions and got a few of my short horror stories published in different anthologies by a bunch of small-ish publishers. I also wrote and published five non-fiction books, two of which were written together with another author. My co-author is far more popular than I am, won several national prizes and published books with all of the BIG names of Italian publishing.
Wanna know how much money I make with my books? Zero
Absolutely NOTHING.
My co-author (whose most famous book has been around for nearly two decades at this point and had more than 20 reprints) used to make, at best, five-ish months worth of salary out of published books.
Nowadays... we joke about the fact that, if I were to even get one (1) Patron for my comic, I'd actually end up being the "rich" one.
None of the "traditionally published" authors over here can make a living with the books they write. All of the big names usually have at least another job (the great majority of them being journalists) and the few ones who -do- manage to only focus on "writing" were already rich on their own. Royalties are utterly ridiculous (6%) and publishers do literally nothing to promote your works: basically, the only difference between traditional publishing and self-publishing, unless you're an already "big author" whose name alone sells a million copies on its own, is that with the former you get to have the name of a fancy publisher printed on the cover of your book.
It's even worse with comics, since the great majority of publishing houses only seem to focus on already existing IPs (the youngest one of which has to be at least 30 years old) and the ones who take original works either don't want long series or want series that are basically already famous on their own (BUT you can't publish a work that's already been published elsewhere, not even online, so again, if you have a long form comic you're pretty much screwed, since you'd have to write a whole new story from scratch anyway). There ARE a few teeny-tiny publishers who seem more open about what they take in, but then again, forget about making a living with them XD
Long story short: I'd LOVE to get my comic traditionally published one day, but I'm perfectly aware that I wouldn't be making any money out of it. It'd be just for the joy of seeing it printed and sold in book stores/cons, really. As far as earning a living goes, I think serialized fiction, online platforms, Patreon, Ko-Fi, Amazon Books and perhaps Kindle Vella are truly where the money is. Which doesn't mean that making a living out of it is "easy" or that it's all sunshine and rainbows, mind you: for example, I would never be able to accept one of Webtoon's contracts for an Original (not that I think they'd offer me one, but still :'D). From what I heard, their salary would be just a little bit higher compared to what I currently make with my day job... except that I'd have to work for A LOT more hours and that I'd probably have to use that money to hire assistants to help me with the job, leaving me with LESS money than I had before. So... no, thanks XD
That said, I think that with the right advertising and some luck, platforms definitely offer you better chances for visibility and even earning money than (some) traditional publishers do.