If you research how quickly vaccines were rolled out historically you will be shocked by some of them
Also, if you look into the timeline of development for these vaccines and see how they are an evolution of other developments you would have less concern.
As well, the idea of long term data is based on the scale of many phase 3 trials before. We are talking tens of thousands of tests normally before being approved. This has already had billions, so no comparison.
The closest analogy i can give is thinking 5G might be more dangerous than 4G or 3G or 2G.
If we havent all died from the other waveforms, and all the other EM radiation we are swimming in, and all of our home modems have been on 5G for ages, then i dont see any reason to be concerned.