PC's are able to be a lot better at running games, while being more worth your money. Sure some PC's can be built for thousands of dollars, but you are able to get the same performance from a ps4 pro or Xbox one with much less of a cost.
Let's not forget the fact that:
Popular first person shooters (fortnite, overwatch, tf2, etc.) play better and feel more natural on a PC. No matter what a mouse and keyboard are always more accurate than a controller
You are able to use any controller as long as it has a USB cable.(or have an adapter)
There's a much wider variety of games thanks to emulators, and services such as steam or GOG.
You are able to use voice chats like Skype, discord, and teamspeak on the same platform as you're gaming. Which uses less power and is easier to manage.
Recording and streaming from a PC will always be easier and quicker than on a console