I see these every time a bicycle path intersects with any kind of car or train infrastructure. It just seems really patronizing, as if we’re not capable of slowing down without getting off the bike; it also shifts responsibility onto the cyclists if there is a crash based on something arbitrary (mounted vs dismounted).

Only if you’re riding through it completely not paying attention. I’ve got exactly such a crossing near my house, and I ride over it very frequently, both on a mountain bike and on a skinny-tire road bike. And I’ve never once had the slightest issue, because I pay attention to where the tracks are and momentarily go at an angle to make sure I cross over them more perpendicularly. Just takes a slight swerve at the right time, really.