I can snap the heads of cheaply made screws or ones made from softer material like “brass” with a screwdriver let alone an impact driver.

If I am doing something with a lot of screws, say decking, then I will spend more on my screws simply because I want better quality if I am going to be fitting a few hundred in a day. I also want to know that if I come back to it in a few years that the screw will unscrew quickly when I come to it. Sure it can be a significant cost increase but the time and frustration saved makes it back.

Quality screwdrivers like Vessel Megadora or Wera or Swisstools or similar tend to cam out less than the pack of ten you got from the dollar store. Same with the hex bits for your impact or drill driver.

Last test I heard had Roberson above Torx for reducing cam out, but if you camming Torx that easily I would just switch to an actual bolt if it needs that much torque to tighten.