DRLs stay on all the time and can't be switched off. Yes they are a little bright, but being so low they don't blind anyone, it's not like having poorly set up HIDs that piss off every oncoming car.
They can when going over a hill and you just don’t know it because you’re behind the wheel and not the one being blinded and that’s the reason the law requires them to be switched off when the headlights are on at night.
Being low makes no difference and the law is specific about the do’s and don’ts for low lighting.
Crests near bends are particularly dangerous for these types of lights and you’d be long gone without knowing the oncoming driver just ran out of road and crashed because he suddenly couldn’t see the change in road conditions in front of him.
It’s the same reason self-levellers are required for HID lights.
Low lighting offers no safety benefit for the driver simply for the reason that the illuminated area is just in front of the car and it is not possible for the driver to react in time if they did see something on the road.
Usually they'll still wonder what they just hit.