Okay, I just found another solution to a Sims 4 problem that has had me frustrated ever since I got the game.
It has to do with that OBNOXIOUS dialogue conversation box at the top center of the window.
I've given up asking EA to give us the option to get rid of that conversation box long ago.
That box is directed connected to the particular character who you are currently highlighting.
All you have to do is click on a character, in the bottom left part of the window tray,
who is NOT having a conversation and that dialogue conversation window disappears.
Of course, this option works best when you have a number of characters in your household.
Surely one of them is not having a conversation with someone at that particular time.
If you have a pool just send a character to swim laps.
For the life of me, I never remember a character ever holding a conversation
while swimming laps
Or maybe send the character to use the bathroom.
No conversations on the toilet that I can remember either