Same thoughts I had when reading this. For me it sounds like the "we have setup a CI workflow to run unit-tests" equivalent for software development - yeah of course you do! :D
That's right. Though, I expect that this may change with the next macOS version this year. They (probably) have the knowledge how to apply a good embedding model on all text files, and their hardware is capable of doing it in an efficient way.
Interesting. How long does it take to build the index of a movie like spider man (on whatever hardware you have at hand)? And how big will its index be?