Anything that prevented the relieving the load on the boom in such conditions could potentially do damage... that's why job one on any broach is to blow the vang.
Preventers CAN cause problems as well as cure them... I think they are best used on long legs in big seas where gybing is infrequent. I'd question their practicality on inside waters where course changes will be frequent. In that case I think their benefit is outweighed by their inconvenience.
Practice and careful, attentive helming and good boat handling skills are what you need then.
1984 Fast/Nicholson 345 "FastForward"
".. there is much you could do at sea with common sense.. and very little you could do without it.."
Capt G E Ericson (from "The Cruel Sea" by Nicholas Monsarrat)