If the water is too strong your pipes will not be able to contain it and it could cause problems.
Water essentially flows into the water pressure regulator at one speed, or pressure, and flows out of the regulator at the correct speed.
Not all homes have water pressure regulators, but you can install one on any home. Newer homes usually have these regulators, but if you buy an older home, the house likely will not have one unless someone installed one later.