I wonder what it would be like to have a giant Mason Bee hotel in a riparian buffer strip alongside a plot. One problem would be as you point out that predators could find them easily. Another might be that pollinating one crop doesn't do enough for a mason bee all season long.
I thought you meant "Giant mason bee" which is not native in north america, is an endangered species and whose jaws might not appeal to the uninitiated.
It looks like some folks use them for berries though: https://backyardbeekeeping.iamcountryside.com/plants-pollina...
We have some of those in our wild crazy yard. I gotta build me some homes for them because you're right they are so cute.