IMHO, the larger the profile of the optic, the more likely it's going to get bumped at some point. That doesn't necessarily mean damage or change of impact but it could happen. Like many on the forum, I chose to put a low profile reflex sight on my gun (see Sightmark Minishot, Vortex Venom, Burris Fastfire style red dot). My rational for this small sight is that it is of minimal size so perhaps slightly less likely to get whacked on something. I also like the large unobstructed field of view it affords. An advantage of reflex sights over a scope is that wherever that dot points is where the shot is going to go, regardless of whether you have a good cheek weld on your stock.
I was gifted an inexpensive (~$65) Sightmark Minishot and it has been on my 12ga TC Encore turkey gun going on three years now. It has held up to an exclusive diet of heavy loads, 3" - 2oz turkey loads and 2.75" rifled slugs for deer. 3" moa dot with two brightness settings, weighs 2.4oz, and has a lifetime warranty. It has performed just fine so far. I am reasonably careful with all my firearms, optic equipped or not.
There are lots of red dots to choose from and something available for most any price point. If you're still concerned about damaging optics, fiber optic sights are probably the next best thing. Good luck with your search.