The internet has existed since before I was in college, so I also "grew up" on the internet. But you're vastly overestimating what you can learn from randos in chatrooms and forums. Most of the best, highly experienced people in this industry never post in chatrooms or forums. You're getting a biased sample, and don't know what you don't know.
Will this work for low-value piecework, or learning how to use an API? Yes, for a while. But this will only take you from absolute noob to moderately competent junior. In order to grow in your career, the broader context, business knowledge, connections and intangibles you gain from being around senior colleagues are invaluable.
I say this from hard experience. At the start of my career, I thought I could learn everything I needed to know on the internet. I was wrong. Even if most of the technical details were there (they weren't) and correct (they aren't), in every career, your accomplishments are based on your personal relationships. Always. I can't emphasize this enough.
It's hard enough to make those relationships, even when you're in the office every day. Trying to do it all by video call is just living life on hard mode.
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Edit: people seem to keep interpreting this comment as "it's impossible to grow in a remote career". That's not what I'm saying at all. I'm just going to respond once here:
a) I don't know if it's "impossible" to form strong personal relationships remote-only, but it's much harder.
b) Obviously, everyone defines success differently, and maybe your definition is different than my own, but
c) In my experience, all other things being equal, the more time you spend around other people, the better your career will be.