Electronic gimbal won't break immediately, I have taken mine all over the world. BUT they are definitely more fragile especially in rough conditions.
A steadicam is a piece of metal. It's super robust. Safe to bring most anywhere. The blackbird actually folds down quite small, you can remove the bottom bar and re-attach easily for travel. Blackbird cannot be used inverted, Glidecam can be. But is not as easy to balance and learn as blackbird.
However, steadicam or blackbird both take time to learn, and even longer to master. Gimbal can be learned very quickly, better to be ready to use quickly and without much practice.
For both, you must learn and master proper balancing. Many people do not.
While I agree a gimbal is waaaaaaaaaay more fragile than a steadicam, even a steadicam needs to be looked after. You get grit or sand into the bearings and it will be bad news for you.