Steam's DRM is completely symbolic. There are widespread cracks available and Steam is AFAIK not even bothering with the cat and mouse game, and Denuvo games released this year are being cracked in < 24 hours.

I would never underestimate the lengths people are willing to go to to 'crack' games. Countless online-only games have been cracked with users reverse engineering the network protocol and writing their own servers. LLMs will probably greatly ease that process as well.