I had an overbearing boss like this once. We had a death in the family, and he wanted to announce it to the entire institution, asked where/when the funeral would be, etc.
We squashed that pretty fast and got away from him asap.
I think some people have the notion that this somehow improves morale, or makes them a ‘cool boss’ - or something.
my husband’s female boss got really pissed that he would not let her put out that it was his birthday.
“ it’s OUR day to celebrate you”
Just go to Costco and buy a cake for no reason! You still get cake.