Alex said exactly what I was going to say:
People have to start somewhere.
Letters From the Green Dude demonstrates that even the finest art droid still needed a bit of honing before getting in the prog. The way you are going to get better is posting your work, asking for critiques and then going away and working on it. Working on a sample script and then getting an editor to look at it is another way, it doesn't mean the artist is thinking "All I have to do is show Tharg my work and I'm in there," although convention horror stories suggest there are folks out there like that (I suspect if they posted something like that here they'd get their balloon burst). People rarely ask "Do you think I am progworthy yet?" here, because the answer is a) only Tharg has the final call on that and b) probably not (yet). If someone was obviously exceptionally good, a poster (or droid) might jump in and tell them to show it to Tharg immediately. However, I don't recall that happening, especially as they'd presumably already have had an airing in small press or indie comics and presumably created a bit of a stir, but stranger things have happened.
Encouraging people to keep working at their art and giving advice on what they need to do is hardly "false hope," it is just part of the process. Granted getting in the prog might be an ultimate dream but few will make it, that doesn't mean the journey isn't worthwhile - you get better as an artist (if you keep working at it and take the advice on board) and if you do that you can get your work into small press and indie comics. Keep rinsing, washing and repeating - you knows, you might just have the combination of talent, hard work and luck that gets you noticed by Tharg but even if you don't it is hardly wasted effort. You'll be a better artist and you might have seen your work in print.