Not everyone wants to bother with all the additional work a PC brings. Which is why consoles have a bigger installed base than gaming PC.
Actually, that's not true. PCs have a larger install base in North America and Europe. Only in Japan do they have a larger install base- largely because Japan is a highly populated area and many households are small in space don't have the space for a PC.

Even the most rudimentary PC bought today can play many games out there.

Only it does. That's how you fit a game from a superior platform into an inferior one.
The only way to fit a game from a superior platform to an inferior one is to make the game inferior on that platform. I would not release my product on any platform where I can not assure the highest quality over time.

It's not my responsibility to worry about bitching. FFXI is still alive and kicking, despite the bitches.
Nobody said you had a responsibility. that doesn't mean this is a good thing.