As for fragility of the blade - before I got the bunka, I'd read a bunch of comments of people tipping the gyutos due to the thinness.
I could rock chop the bunka without issue but you do hear a "ting" every so often if you try and turn a touch too early.
Only issue with the edge I ever had was I handed the knife to the finacee to wash, she handed it back to me to dry and there was the slightest little dent in the blade. Was super easy to fix, but not sure what actually happened.