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 – naturally by cars and motorcycles too, if there’s enough room.
Unless the bike has a trailer, or it’s a cargo bike, sometimes even mobility scooters may struggle.
Good luck getting a kayak through too, one of these means I need to take a pretty big detour when I want to go kayaking.