This is not correct. Coronary calcium scores are one of the most accurate tests for risk of heart attack, in some ways more accurate than angiography. Most heart attacks do not occur at sites of arterial narrowing but occur when a plaque ruptures and a clot forms. Coronary calcium scores give an idea of how much plaque there is in the coronary arteries overall, the more areas of plaque the higher the risk of one rupturing and causing a heart attack. Angiography will tell you if there are dangerous narrowings of arteries that would be better treated by stents or bypasses.
For example my coronary calcium score was 645 at 57 yo. This puts me at a risk of major cardiovascular event ( heart attack stroke or death ) of about 20% over 10 years , and a bit worse if you add in a few extra risk factors, and is in the highest risk category where aggressive treatment with high intensity lipid lowering therapy and aspirin is required as well as reducing any other risk factors like hypertension etc. My angiogram showed a 15% right coronary artery stenosis and a 50% stenosis of the left main descending branch. This does not need stenting or surgery, but despite not being terrible does not change the risk calculated from the coronary calcium score, because they measure different things.
These issues require a good understanding of the statistics and research used to work out these risks and of what treatments have been proven to reduce those risks, the only people who should be deciding what treatments are a good idea if there is known cardiovascular disease ( based on a high coronary calcium score ) is a cardiologist. Standard medical treatments used in these circumstances have been tested on a massive scale - hundreds of thousands of patients , over decades and are proven to reduce risks, and by a lot, roughly dropping the chances by half.
This research is on a much more massive scale than the evidence of GLP's reducing risk, by a factor of maybe 100 to a 1000 times as many patient years of testing.
Statin therapy reduces new plaque formation and stabilises the existing ones making rupture less likely, and low dose aspirin reduces the odds of clots forming if one does rupture. GLP medications especially semaglutide has also been proven to reduce risks of stroke, heart attack and death, but not as much as statins, and if there is any degree of known cardiovascular disease or a calculated high long term risk from traditional risk factors, then both are a good idea, not one or the other, and no one should be stopping statins used for high cardiovascular risk or known heart disease because GLP's also can lower lipid levels. They are not as effective and the risks of stopping statins could be very high maybe a 10% increased risk of serious cardiovascular disease over the next 10 years, or an extra unnecessary 1% chance of death, heart attack or stroke per year, whether you are taking GLP medications or not.