install, fire a few shots, use tactical oven mitt to make sure it's tightened up again once it heats up. then try to remember to break it free before it starts cooling again.
Nobody is doubting you or that they are used in the applications you mentioned.
The difference is that in the applications you mentioned, there may not be the same known history of a 3000fps projectile about 16" in front of your face, being driven by an explosion right under your neck, suddenly demonstrating that some washers might not set the can perfectly straight once they get tightened down. It's great if you have found that it works for you. maybe you have a very high grade of washer that has a much lower chance of introduction variations than other people have had with some things.