The arguments for long term safety concerns don't really hold water when you start looking at the vaccine components. The ingredients in these vaccines, with the exception of the custom-built mRNA itself, are very generic compounds you find in tons of other meds people take as over-the-counter stuff every day.
The mRNA itself is short-lived. mRNA at most in eukaryotic cells has a lifespan measured in days, in most cases hours or minutes. It can't just stay in your body indefinitely. We have no genes in our DNA to produce the mRNA for these spike proteins so once it's all gone it's gone. It also can't end up incorporated into your DNA, the mRNA transcription works one-way. People see these terms, don't fully know what they mean or where they fit into cellular protein production, and they panic.
The science behind these mRNA vaccines has also existed since the 80s. It's not as new as people think.
The idea of getting long term data as a drug is used is also nothing new. We're now in 4th stage clinical trials. It's really just the monitoring stage where they gather data on long term usage. All drugs on the market sit in this stage for ages while being prescribed daily. It's not like this is some medicine still sitting in alpha testing. Further vaccines only give you that single dose. Other meds that are sitting in this stage 4 are given constantly and have a direct impact on your body (unlike vaccines that just stimulate your body's natural immune processes)... nobody squeals about those vastly more invasive medications.
Why this particular set of vaccines were singled out for this level of irrational and largely uninformed scrutiny over all the other drugs people mindlessly shove down their throats is beyond me.
EDIT: I do think the groups dealing with informing the public about this sort of stuff could have done a better job of explaining these things. I doubt most people would have bothered to listen and would have panicked anyway though. Look at how long it took to drill the basics through to
@LCBXX. The man probably still doesn't accept what I'm saying, he just can't find the chink in the armour he believes is there.