I'll give Disney the benefit of the doubt on this one.
This certainly wasn't "cheap", as they're often accused (it's cheaper to leave it, put up chain link fences, etc) And they can't be criticized for past safety oversights (DL BTMRR) and then criticized for going overboard on this issue.
The danger, I assume is not so much the bamboo directly falling on someone, but rather the risk that it will fall and block the path of a self-propelled ride vehicle, causing injury during a collision. Neither Kali or Everest can stop a vehicle outside brake zones.
They have probably never had this concern on Jungle Cruise (or the RR) because the vehicles are driven by a human who can stop it in time to avoid a collision.
Also, give Disney some credit. This is the company that spends thousands of dollars making custom-decorated tarps when they paint buildings. Obviously they see what you all see. An just like the complaints about the "ugly green walls" of the Dumbo tent before it was landscaped, this may call for a little patience. It's really ridiculous to expect them to tear out bamboo and replace it within days.
Now if it looks this same way a month from now....
(I don't quite understand the bamboo connection to the Tree of Life branches falling. The ToL seems to be a structural integrity issue versus wind-blown plants)