Okay, but we keep coming back to why other avenues besides online dating are necessary.
Which, by the way, nobody has answered yet.
There's no general rule. I met my current girlfriend through online dating. Someone I dated a few months last year? We basically just made out at a bar. The only applicable point is that you've got to cast a wide net -- and that's only because it takes time to find someone who's into you
that you're also into. Otherwise stated, you can date solely through online dating. I did, and I did quite well, if you measure that through dates and hookups. On the other hand, I did poorly if you assessed whether anything developed into a healthy relationship with someone I could see a future with.
Anyway, the point is, I want you to separate "the average guy" in your mind from "the average guy" on Tinder.
Mostly because, as you recognized, the vast majority of men on dating sites are fucking morons. Terrible pictures, terrible propensity to spam women with either "hi" or sexual propositions. I've said this before, but: if you don't ask for sex or send a dick pic in the first message, you're actually better than a non-trivial population of men.
That doesn't mean you're rising to the top, however.
Some of that's random. It's literally "what's the first message in the inbox that isn't a dick pic and fuck now there's a dick pic and I'm frustrated so fuck this I'm closing the app." That actually happens. The best you can do is present yourself in the most attractive light.
Yes, incredibly attractive people can do that more easily than the rest of us, but -- and I don't know what you look like -- if you've got three pictures that are: you with a dog, you rock climbing, and a full-body shot that shows you take care of yourself... that beats poorly lit, terribly angled selfies any day of the week. And it broadcasts some elements of your personality, since let's face it, we all go to the pictures first, and if we're intrigued, we'll read more.