Simply because it appears by your statements that you found some of the larger planes a little more difficult to fly. The trend for most people once they solo is to get bigger planes, thats pretty obvious at any field. But it seems you are not comfortable or as comfortable with bigger and you'd prefer smaller. Which is fine. But as has been said there is no problem flying large planes in close or in confined areas and thats just how it is. But there is no reason not to fly smaller if you enjoy that. But enjoying it and it being better are 2 different things. Currently I fly planes with 9" to 7' wingspans and enjoy them all. They all fly differently and that is part of the fun. Unlike my father I enjoy "Odd Scale Aircraft" the most. If you like small planes please enjoy yourself and don't worry about what the rest of us think.