I agree. I like his acting as well. But I also like my in-laws spaghetti sauce yet and I am sure others have in laws that do great things as well. Yet I rarely see an FR post about their birthday. Again...just a commentary on how we treat people differently and one main difference is the use of public praise.
The difference is, I think, many people get a common type of enjoyment out of the performances of somebody acting in a movie or play, whereas there isn’t any type of commonality of experience with your in-laws or relatives.
You can enjoy something without Hero Worshiping it and placing it on a pedestal of some kind.
Your in-laws have a sauce that’s used by the public ?
Actors (musicians, artists etc.) exercise their craft in public ergo the public commentary.
So far to my knowledge your in-laws haven’t reached enough of the public for public commentary much less appreciation.