Comment by drnick1

This underscores a major issue with commercial software like Steam and games obtained therein. You cannot trust that software not to maliciously scan your device for secrets such as crypto wallets or other information. Ideally, you want to run apps like Steam, Discord, Zoom and whatever else does not come from a trusted distribution repo as a separate user. This is not always convenient however, and the compromise I adopted on my gaming PC is to bubblewrap Steam. Do not mount things like /home and devices games should not be using in the sandbox.