It’s scanning your computer by default to check what programs are you using or what games are you playing

This is exactly why I like Discord.

If I'm online and not playing a game, I want my friends to see that I'm online so they can message me.

If I'm playing a game, I want my friends to know I am playing that game.

If it's a multiplayer game, they can join in.

If it's a single player campaign focused game, they know I won't be keen to play a multiplayer game right now, but they can still message me if something big and spontaneous is happening.

If I don't want to be contacted at all, I close discord.