maybe because it is important for devs to analyze the player's behaviour? Not the first and wont be the last devs who do that.

example: https://strobotnik.com/unity/googleuniversalanalytics/

It's even used inside of steam
https://partner.steamgames.com/doc/marketing/google_analytics

Or here:
https://steamcommunity.com/app/612470/discussions/0/1291817208499278648/?l=english