Re: HAWKEYE borescopes
My gunsmith has one. I use it several times per year to look at my barrels. You are right, sometimes I have apprehension of looking because any wear is bad wear! It never gets better anytime you look through it. At best, it can only stay the same, but I have yet to have that happen!
They are great tools though. Very simple and very clear. The 90 degree eyepiece and magnifier are a must. Grab a 2 AAA cell maglite and you're in business.
If it's not far, it's boring.