It all come down to how much you want to pay. The majority of the TT folks are satisfied with the products available. Those who are not satisfied with the typical TT product are willing to seek out the higher dollar or unique material units.
If you have the money someone will build what you want. :)
As for the TT companies making the gigantic profits, it is a price driven business and anybody with a hammer and sense of business is welcome to jump in and make their fortune. However, keep in mind that the majority of the manufacturers folded like a cheap card table in the last economic turn down.
They in turn were bought up by Thor and Forest River.