I'd think German traffic engineers could come up with a better solution, yet these are everywhere:
The bike paths themselves are desire paths for cars and motorcycles.
To block them off, they put up barriers, but those also block cargo bikes, wheelchairs and strollers, create a collision hazard, and force all cyclists to stop and dismount for no reason.
Of course, they'll be bypassed wherever possible โ naturally by cars and motorcycles too, if there's enough room.
These are worldwide, they keep motorized vehicles off paths except for maintenance.
You ignored the side view, they can be easily traversed while on bike, I do it every day. But I love when the Internet second guesses engineers. Guess why these are on either side of a public road? Because otherwise idiot cyclists would not slow down and get hit riding into live traffic.