use your proprietary software in the OS you are allowed to use. Not seeing the issue.
The OS they are able to use is Windows 10. They likely don’t meet the TPM requirements to update to Windows 11(as if you’d wanna use it anyways); so when W10 goes EoL, they will be SoL(shit out of luck) on getting future security patches. Which is y’know, bad, especially on the machine you do actual work on.