Edit: whoops lol, took so long to type other ppl came in b4 me in posting, sorry if i repeat any1
Think about it like this:
A team of around 100 or so people team together to work 2 and a half years to put together a game like Halo or Half-Life. Now this is people in the coding, modelling, texturing, etc... departments.
This is for the game, and the engine to run it (like say, unreal 3) takes another couple of years and lots of people to put together.
Now if u look at about 95% of all games shown in the showcase here ARENT put together by a team, and if so, the team consists of far from 100 people (think that's too much? look in the credits of any game)
Yes, the engine has it obvious faults, but like seth said, there are people working to make it work as fluentally as possible.
Your opinion is very honest, and many people would agree with u, and i agree completely on how underpowered the engine is.
But if u read about Beyond Life, Wehtman (spelling, sorry) posts that he has had this idea in his mind for a long time and fpsc was a place where he could show it. I think this is more of what TGC wanted to do with the Fps Creator, and not a major 2 year project. So to answer the thread question: Yes, u can.
http://i286.photobucket.com/albums/ll104/krowsnest618/PlanetHelltag.jpg?t=1215648198