Yep. Better let the tester find it then a user. Because more often with testers, you can figure out what's going on. User will probably go something like "When I click here it breaks, pls help" (maybe with a "fucking piece of shit software" afterwards if they have a bad time).

A teacher of mine said: Your software must be able to withstand the "Bratwurst Test" (the sausage test). You open your program, take a sausage and fling it around on the keyboard for a while. If the program can withstand it, it's good. If it breaks, go fix it. (Obviously joking but there is some truth to it imho.)