system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why can we use controllers with PCs but not keyboard and mouse with consoles?
gpt
Consoles can use a mouse and keyboard. Almost any USB mouse/kb will plug in and function with modern consoles. You can type messages, browse the web, etc.

Some games do support kb/m on console: Counterstrike and War Thunder for example.

Many games don't just because it takes extra effort to program for, and the kb/m has a distinct advantage in many game types that makes it unfair.

TL;DR: It's extra work and an unfair advantage, but kb/m can be used on consoles and on certain console games.