For security, yo.
I'm sick of corporations and bootlickers who claim you cannot do games without anticheats. Even if I am not personally running that software, all the users are still normalizing spying on our devices and networks.
If your business model relies on violating the privacy of others, your business deserves to die.
It's the least convincing excuse used to circle around GDPR and similar laws. "I swear, it's for security! (please ignore the part in our ToS that says we can resell your HW configuration profile and installed software stats to our commercial partners)".