It really is a valid point. Humour can easily be overdone.
Microsoft's Guide to Humor https://www.microsoft.com/en-us/education/training-and-event...
Microsoft's Guide to Humor https://www.microsoft.com/en-us/education/training-and-event...
https://www.nytimes.com/2016/04/02/technology/april-fools-un...
This is the sort of thing that scares most people into tepid, mediocre Dad humor at work. Sometimes, that's a healthy fear to have, even if finding yourself burdened by such constraints is unfortunate.