PC Gaming isn't completely dead, but due to piracy, it has become extremely limited to titles that heavily focus on online multiplayer (or require you to go online and verify CD Key). For one thing, we are probably not going to see RTS on console anytime soon. (That being said.. ps3 does support moues + keyboard.. mmmm)
You are also right that most consumers don't care. A lot of times they only say thing like this to give an answer to investors/minority of hardcore gamers on why certain things failed blah blah blah. You don't have to listen to them if you don't want, becauset most likely they are not speaking to you.
Finally, there is no doubt that there is literally no reason to release a kick ass single player experience on PC when you can sell more on console. For those pc-only gamers out there, you really have to give some thanks to companies like EA and Take 2 to even bother release fantastic single player games like Mass Effect, Oblivion, and Bioshock on PC. Then again, if you have a game that builds on Xbox360, it'll probably takes less than 2 month to port it to PC.