You're absolutely right, and that's an exciting area: viewing conditions matter!

Well, different monitors aren't really different viewing conditions, but it's a similar idea.

When people can't see colors too well, they turn up the brightness. But that changes the problem entirely.

Even something like whether a window has curtains or not will completely change whether you can perceive a certain "vibrance." Lots of the conversation in parallel replies has probably suffered due to such confusions.