I think we underestimate those that do make it professionally when it comes to classical music, one of the most cut-throat genres there is.
I think the bigger question really is why do you aim to take it professionally. I think the issue is not your progress, but the pressure you're putting on yourself to be as good as other people, and so maybe worried that in a professional environment, you're not going to make the cut.
Looking into the past is a waste of time, you cannot change it. You must however also face the reality that you may never become a professional in this field, and that is OK. The internet is both a wonderful and awful place, for exposing talents across the world, but also raising the bar that much higher.
My advice is this, don't look at your end goals, focus on your short and small time goals, and also whether or not the pursuit actually even makes you happy. If you're going to emotionally fall apart because a college may turn you down, or an audition goes bad, maybe this just isn't for you, and that is also OK.
After not being able to afford to go to Music College, I had to face the reality that piano for me was always going to end as a hobby and while the story was sad, it is also a huge weight lifted for me to know that I was then able to focus on actually having a 'life' while still doing something I love and enjoy, without the pressure of potentially failing.
There are plenty of amazing musicians that for one reason or another do not get the exposure of platform they deserve, but that does not stop them from doing what they love. That should be the most important thing here, is it the instrument - or the stage?