yes, they cause more eye strain. nicer displays are easier on your eyes and often have auto brightness adjust and other features that also reduce eye strain

there are things you can do to mitigate it.

No I don’t think so. The trick with “computer display will hurt your eyes” is it’s the same for practically everything. Books, TV, etc. If you use it at a close distance (less than 1.5-2 meters) to your eyes. The lighting is also a factor, if your room is dark and your screen is bright - it’s really harmful