Personally, I don't really understand why people feel so passionate about this argument. Why can't you just game on whatever you want without belittling others? What is next? Are you going to belittle people who prefer to game on their phones? I understand the flexibility and performance of PC gaming, but setting up a PC for gaming can be tedious. Consoles aren't as flexible and they don't perform as well as a PC, but they are virtually plug-n-play. Then, there are the games. Some games are console exclusives. Some games are PC exclusives. If you love Mario and play Mario for hundreds of hours, then why would you buy a PC? A PC is far superior in terms of flexibility and performance to a Wii U, but a PC doesn't have the newest Mario game. If you like playing tons of different games regardless of any specific franchise, then PC would be a good choice. There are tons of games out on PC, and the games are usually cheaper on PC. Also, PC bargain buys can be incredibly cheap.
Obviously, if you can afford to have all the systems, that would be ideal. However, I understand that most people have a budget.
In the end, just play the games you want to play on whatever system you want to use.