Hi,
if the bearing sit tightly, I do not glue them either. With the painted fins, they usually hold fine just so.
Otherwise, I only loctite metal bolted joints, that's it.
Of course you can also glue bearings to shafts, bearings to bearing seats, but that makes maintenance a pain later.
I found the less you do, the less you do wrong, and the less issues you have in the long run
and I speak of 400-600 flights at best, between human brain failures leading to the inevitable
Kind regards
Eddi
Born to fly ...
forced to work.