High blood pressure exerts tremendous damage from the inside of the vascular system. It hurts the kidneys, heart, vessels, liver, and more. Even if you can't find the source (there are probably over a dozen influencers of blood pressure), reducing the damage is good.
Addressing root cause it always best, so find that when possible and fix it. I can even say exercise, food, and supplements can bring it down to normal or below, but maybe only some of those options address some root causes.
Do what you can, but we can all agree chronically high blood pressure is not a good thing.
No, what we can all agree on is that it’s very possible that blood pressure is just an indicator of underlying problems that are doing the real damage. I do not claim to know for sure, I just know that science and medicine have become the least credible aspect of our society.