Most editing programs do this right. If I open a file in RawTherapee and then in Capture One (maybe I have some recipe in one that I want to compare against something I do in the other), I don't want my adjustments in RT creeping into C1 or opposite.
Some function modifying data that another is using is the most common source of computer program errors. Luckily the main solution is well known; "You get a copy, you get a copy, everyone gets a copy!" Do with your copy what you want, and keep your fingers off the original until given express permission.
Why am I surprised that Adobe is the one who can't keep their fingers off?