Let us sell Heroes and buy from a bigger pool

I made a thread about this a while back but I really think that the current Hero system puts way too much emphasis on randomly awarded Heroes over the Hero Market. There are way too few Heroes to actually buy on the Market (which makes Impactless Sites grossly underpowered) and being forced to take Heroes can result in having too many Heroes and not enough places to put them on small maps and often breaks immersion as well (i.e. why are the Vodyani allowing untermenschen to take over their systems and senate? Or "Ecologist" Riftborn doing the same with filthy biologicals?). You could kill 2 birds with one stone by letting us sell Heroes just like with Ships or Resources.