Bumps are fine, it's crushes that are bad. So long as you don't squeeze the blank into anything (and obviously don't be slamming it into trees) you'll be fine. I would bet dollars to donuts anyone that's broken ANY rod, either got a lemon from the manufacturer (very rare in this price range from one of the "big 3" of bass fishing) or they crushed the blank either by stepping on it, throwing their tackle boxes on it, rolling stuff over it, etc (99% of the cases). Rods simply don't break by themselves, and you'll know immediately if it's a lemon because the first time you flex it it will snap.
I've been going full clip in my Pescador Pilot 12 (about 3-4 MPH) and had a low hanging branch hit two of my rods, and literally stopped my forward momentum. Granted they weren't the rod you're looking at, but one of them was a GLX, and the other was a Phenix Feather. Both very "light" rods, and they are both completely fine (I do not recommend doing that, as the sight of them bending further and further until they whip back up on the other side of the branch was terrifying).
If you're on the fence, just buy it. They're excellent rods and there really isn't too much of a reason to go with anything more expensive until you get into GLX/NRX territory.
With concerns to warranty, if you bought a truck and 2 years later wrapped it around a tree, would you go complaining to the manufacturer for a new one? No, because you broke it due to abnormal use. Same goes for rods, if it works the first time you take it out, then 2 years from now you set the hook on a fish and it snaps, tough luck, it wasn't the manufacturers fault at that point.
ps If you're unsure you damaged a rod doing anything, flex test it on something soft like grass or carpet. NEVER grab a rod and try to bend it with your hands, they aren't meant to put under load from anywhere but the tip, and I've watched many people pick up rods in a store, "flex test" them in their hands and they snap 6" of the tip off. Don't be that guy.