IMO the answer is twofold. first you are right, many managers do not survive. but second is at least as important: they do not look for new money any more or even more would not accept fresh money due to strategy constraints. In professional alternative investment portfolios up to 70% cannot be found anywhere, though they are huge.
do not forget that you just see the surface of this industry in any kind of (expensive) data bases, much more so for free information on the web.
getting more into this is really not easy without substantial capital behind you. but hindsight and a skeptical approach can help a lot in avoiding stupid mistakes in delegating investments.
peace