i'm afraid you're confusing matters. full frame (35mm) and pro's have nothing to do with eachother really. aps-c is good enough for most pro tasks, actually it's probably better for most of their tasks. pro's will get what they need to get the job done, as long as they can justify the price (much harder to when it's a business, than when it's a hobby
), and that's about it. also, mainly because of this, nobody would bother developing cameras these days for pro's, the 35mm digital cameras you see are for the enthusiasts who have the cash. in fact, i believe you're mistaken at another level too: it's not about what you need, as an amateur: do you honestly believe you need the gear you have to take the pictures you take? a good p&s digital would do just fine, and most people wouldn't be able to tell the difference in the results anyway. gear is 99% about your enjoyment of the hobby, and 1% about what you need to "get the job done" (get the results you want), precisely because you're an amateur, and this is a hobby, it's supposed to be fun, not functional.
and 35mm is about more enjoyment for some people (and it's about less for others, and just about following the "latest greatest trend" for yet some others). if you don't feel it makes sense for you, just ignore it, aps-c is not going away any time soon, don't worry. Loads of other stuff happened since you shoot a dslr which you didn't even notice, it didn't make your camera non-functional, though it might have made it obsolete according to some people who miss the point entirely
, but it didn't hurt your enjoyment of the hobby in any way. If you don't care for 35mm, just shrug and go shooting with your perfectly okay aps-c gear.