You should question this and advocate for yourself. The important number is total lifetime exposure to LDL (actually apoB, but doctors aren't routinely testing that yet). The arterial damage is cumulative. You shouldn't wait until you are at high risk of cardiac events to take action. The time to slow down the progression is now.
I'm just replying based on taking your comment at face value. LDL of 150 is very high and living with that for many years is very damaging. Obviously it's something between you and your doctor, I'm just encouraging you to consider and get reasoning from your doctor about whether this approach is really best for your health.
It's a borderline kinda thing. He said if it was consistently in the 160s he would probably recommend them. My previous doctor was basically in the same camp but had me taking blood tests every 3 months for a year to see if it was stuck there.
I'm just replying based on taking your comment at face value. LDL of 150 is very high and living with that for many years is very damaging. Obviously it's something between you and your doctor, I'm just encouraging you to consider and get reasoning from your doctor about whether this approach is really best for your health.