I had a previous Reddit account before I switched phones I forgot my details and I saw people mention things like this but the difference is that they would often say the vaccine is much worse not just in kids but also young adults and the reality is that it wasn't true. The vaccine is only worse in young men for myocarditis, marginally. But it's much better for things like pericarditis, heart failure and survival outcomes. On balance the vaccine is better, but how much better obviously decreases as you got younger and healthier. But it always remained better.

If people just said that in young, healthy adults, it isn't quite as useful as in older ones therefore the vaccine is not as much of an imperative then that would be fine. The problem is that they usually went further than that and said therefore don't take the vaccine.