Me and ol' Bo went round and round a few times on this subject. Sure miss him.
Did an article on finesse fishing once with the late Ricky Green on DeGray Lake in Arkansas. We fished timbered bluffs on the lower end of the lake in April, when most of the fish were postspawn. We did some experimenting with 10-pound test down to 1-pound test (yes, not sure about now, but in the 1980s, Trilene made its XT (blue box) line in 1-pound test.) There was a marked difference in the number of bites we got by reducing our line size to 6 lb and then even more of a difference when we switched to the 1 lb. test.
There are points for and against light line fishing but for me, I'll always be a light-line proponent.