A hallmark of conspiracy theorists is that they take completely NORMAL, EXPLAINABLE THINGS and attribute malice, or sorcery, to them. It's a bit like an uneducated person from Medieval times seeing the moon for the first time, and believing it the scheming eye of God.
A lack of information, or understanding, breeds conspiratorial thinking.
So here we have Billy being shocked that the FDA haven't granted full approval to the vaccines, which is common practice. For example, common flu vaccines are themselves often not given full approval until an entire season's over (when the annual flu shot is "outdated"), and the smallpox vaccine took HUNDREDS OF YEARS to be granted full FDA approval (in 2007, the vaccine first made in 1796). In other words, the smallpox vaccine had essentially eradicated smallpox in most countries, a half century before the vaccine was finally fully approved.
FDA approval is designed on purpose to be a slow process to make sure a product is safe, pure, and potent. It's a process made hard on purpose.
Meanwhile, an emergency use authorization slims down the red tape while still requiring a proven safety and efficacy record. To get there, the covid vaccines had to go through 3 very robust phases. Anyone not trusting these phases will do well to remember that stuff like the Ebola vaccine was give out for over a year before full FDA approval, and there exists no dual course drug that has no short term safety issues, but does have long term issues.
Billy's final link is a link which he's pasted several times, and which he repeatedly misses the point of.
Billy, the scientists pointing out that antibodies generated by covid are superior to the antibodies generated by vaccines, are the very scientists who are strongly advising people "not to pursue this as a method of protection". Do you understand why? This has been explained to you three times, but I don't think you actually read your own links, or this board, or comprehend these issues.