It’s been a long while since I last read about it, but I recall that eroge is rooted to PC format because attempts to make sales on consoles were general failures on multiple levels (both corporate regulation and people buying them). Same memory recalls polls taken with buyers, revealed an overwhelming preference for Windows OS. I believe the origin for this bias is because of the PC-98 foundations.
In any case… console aren’t the only ones with “gatekeeping” attitudes. If Apple has their way, and the consumer horde that loves them keeps growing, everything from PC’s to phones will be locked down tighter than a virgin Catholic nun.