One of the reasons I went from the SportStar to a Foxbat is that I feel like I'm sitting in a roll cage in the Foxbat, and I think it will be easier to push open a door,even if it's warped, than try to lift the whole aircraft off the bubble.
However, this would have resulted in low wings being abandoned long ago if it were really a problem. I don't think it's high vs. low wing, and we shouldn't be distracted by that.
It's are you in a bubble or a cage? A low wing can be build with metal forming the cage you sit in, so has some strength when on it's back. And it also has smaller windows in metal frames that you could kick out.
A true bubble is like a fighter jet (or SportStar) and there is no structure to offer support, and nothing but the entire canopy to try to break.