As for long-term effects of covid vaccine, while I think this is a reasonable question to ask, and something I have pondered myself, it is important to note that we are not comparing it to nothing, we need to compare it with the long term-effects of covid.
Here is a review of "long covid", where you can see a large percentage of people suffer from debilitating symptoms many months after infection. The percentage of people reporting long-term effects from vaccines is null so far, only acute reactions in a very small amount of people as discussed earlier: cases of blood-cloths specially in young woman with AstroZeneca and Janssen vaccines, and a handful of reports of myocarditis in
young men/teenagers with Pfizer/Moderna. Note that myocarditis is also a
reported symptom of covid infection itself so we should not be comparing risk of vaccines with an inexistent alternative of life that is risk free.
Of course one may still consider the possibility of unnoticed damage happening that will only show long term after covid vaccines, but this argument can also be used for covid infections themselves.
Regarding the potential lab origin of covid, a few points to make:
1- This should definitely also be a rational scientific debate instead of one tainted with an emotional knee-jerk conspiratorial or dismissive tone.
2- Anecdotal report of someone getting sick in Wuhan lab before COVID was announced is not in any way a proof of lab leak hypothesis.
3-
This is the only article I've found that seems to rationally discuss the possibility of the human origin for the virus. I am not knowledgeable enough to comment on the merits of the arguments. They do not claim any proof but invite for further discussion on the topic.
4- Often people who talk about lab leak to claim it's a dangerous bioweapon are the same people that say "it's just a flu", which contradicts itself. Also these are often the same people that then say vaccines are experimental gene therapies (factual error). Which brings me to the next point:
5- Whether it was a human-made virus or not is unrelated from whether one should take the vaccine or not, or whether other treatment and containment measures should be used or not. Each part of this discussion merits being looked at separately.
6- Jagube's point is spot on regarding criticism of some of the lab-leak comments.