Running an AR without a buffer detent is that last thing I would ever do unless it was an emergency.
The only way to damage the tit on the detent is to overtighten the buffer tube when installing it and bending or cracking the tit, or charging the firearm without the barrel installed which will allow the buffer weight to move a bit more forward smacking the detent tit really good, causing metal fatigue or cracks.
I don't know about anyone else but I would be much more worried about forgetting I had no detent, opening the AR, and launching my buffer weight and spring down the firing line, onto a hot range, or getting hit in the nuts with 3-8oz.
Then there's always the laughter and pointing that follows an now pictures on the Internet.