I agree with you Alegrias. I had the AZ vaccine, even though I have a low platelet count. If the data which are available now had been available when I was vaccinated, I would probably have been given the Pfizer one. However, I haven't suffered any side effects, so I'm happy.
The data on blood clots and effectiveness are still being analysed and it will be months, if not years before there's anything conclusive.
What we do know is that all the vaccines "work". Some of them might be more effective than others and some of them might have side effects for a very small number of people, but the differences aren't that great. In practice, they're insignificant. The important factor is the level of community transmission. If hardly anybody is infected, there's nobody to catch Covid from, so differences in effectiveness become irrelevant. Incidentally, low transmission rates mean that it's difficult to obtain objective data.
The data aren't complete, but it would have been downright silly to have waited for a fuller picture. We know that vaccines are safe for the vast majority of people and that's what is important. They'll probably need tweaking and vaccinating the whole world is going to be a challenge. Ultimately, the success of vaccines will be down to much more than individuals.