As the saying went quantity has a quality all of its own.It does rather go against our concept of precision warfare.
But - given the weapons are significantly less capable but proportionally even cheaper - it does offer its own advantages.
does MLRS still have lay waste to grid square capability?
with precision weapons you need to have an exact location and in many cases you need the en to stay there.
a Russian MRB has 18 x 152mm guns and 18 x BM21 MLRS in its orbat.