Ask yourself, do you think billionnaires have yearly MRIs or that they wait for later because the doctor and themselves will be anxious? It's an argument that treats regular people as stupid.
If you are a billionaire you also have a doctor with the time and expertise to properly evaluate the evidence in a Bayesian framework, and you have time to talk to them and understand and implications. That isn’t scalable.
Also, it’s quite likely that billionaires are having lots of unnecessary procedures and that harm is being caused. The mri scans are not the reason they live longer!