Needing more tractor and sacrificing a cab to get it is just a management decision, not a statement about cabs not being a good thing. Luckily in my case the CEO (She Who Must Be Obeyed) won the cab argument and I got one whether or not I wanted it (didn't at first.) Now I think it was about the best argument I ever lost!
I have been accused of using my little Kubota for a bulldozer (or tank.) I have broken a window and a mirror (preventable with caution but short on caution sometimes during the last 5 years.)
In a situation where you have a high probability of breaking a door glass you have a high probability of getting injured by what would break the glass if it were there. I have taken some pretty heavy hits and not lost a glass when I thought for sure it would shatter (tempered glass.) Just lucky I guess but I broke the small rear vent window because I stupidly left it angled open while crashing through brush. Easily preventable with brain engaged.
Sounds like a situation where you want to go romp around on a dirt bike but leave the helmet behind because you are likely to take a spill and you don't want to ding it.
Pat