Blood pressure may be like a lot of medical science, backwoods. Now we know cholesterol doesn’t cause arterial problems, it is actually created by the body to heal arteries. Statins are poison. When they discovered that statins lower cholesterol, suddenly they had to prove that cholesterol was the problem. Blood pressure could be similarly not the cause of problems, but merely an indication that problems are manifested. So treat the blood pressure, but not the underlying issues. Backwards science.
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.