There isn't any evidence for serious side-effects from mRNA vaccines. The vaccines have undergone significant testing, and they're not doing anything magical.
If you're going to insinuate that the vaccines have significant risks, you should provide some evidence. (This bar should also be a bit higher in my opinion in the middle of a public health emergency.)
Compare a statement like "5g has great potential, but I'm really, really concerned about the health risks of 5g towers". I'd expect that to get voted down too unless you had some remarkable evidence.
If you're going to insinuate that the vaccines have significant risks, you should provide some evidence. (This bar should also be a bit higher in my opinion in the middle of a public health emergency.)
Compare a statement like "5g has great potential, but I'm really, really concerned about the health risks of 5g towers". I'd expect that to get voted down too unless you had some remarkable evidence.