Yes, they can eventually deform. How much and how soon is dictated more by the quality of the crankset than anything else.
With proper torque, it’s not unusual to see these old cranks go through many removal/replacement cycles but 30 is a lot.
Service periods are better scheduled based on actual use and conditions. In my case, I don’t have to service the BB for years but someone who rides in more adverse conditions might have to do it annually. But under those conditions, everything needs more frequent attention.