When the plane took off, there was an implicit agreement on what the onboard conditions would be. Changing those conditions mid-flight is unfair and likely to lead to a consumer lawsuit. You can't get off the plane midflight.
I can understand you point, but couldn't you make the same argument for someone who wanted to take their mask off? If the mandate changed during flight and they did not allow passengers to remove their mask, couldn't those people have a lawsuit as well?
The real problem is so many people are uneducated and don't really know what is going on