Put your biggest rod, with braid, with the max drag that you will ever use, in the rod holder. Have a friend 30-40 feet behind the boat jerk and pull as aggressively as he can, and see how it feels with your hand on the bottom or the rod holder, under the gunnel. A straight rod will stress the rod holder much more than a bent butt.
The only planers I fish are #1's and 2's, along the beach for spanish mackerel. If I was setting up to high speed troll for tuna or wahoo, it would be with a heavy duty Lee, or similar, zero degree swiveling rod holder, with backing plates. and a bent butt rod.
It is easier to prevent damage than it is to repair it.