Some e-gates are slow too. So it can back things up. My trainer has one, and it’s fine, because her place isn’t terribly busy to the point that the gate really hinders anyone.
I wouldn’t use e-gates to keep horses in as primary fencing. As secondary/perimeter fencing I’m more ok with it. For example, that gate only matters if a horse has gotten out of their stall/pasture/run whatever. I’d not let horses into direct contact with it. It wouldn’t be a pasture gate.
I have heard of damage being caused when people panic about the gates. Not at the facility I go to, but just through the grapevine. Most will stop when it hits something solid, as mentioned. You might end up with cosmetic damage (still sucks!) but not a wreck. Panic can be natural though.
Everything has faults. The other day the gate wouldn’t let me out of the properly for who knows what reasons. So asst trainer came and climbed over the fence to get to the keypad on the other side and it opened. This would be a huge hold up at a place like Windurra now that I’ve seen the visuals.