In my experience (and this is anecdotal) there’s no rhyme or reason as to why this virus affects some people more than others. You can try to tell me why, but it would ask me to betray what i’ve witnessed (or lack thereof) over the past two years.
The data isn’t reliable nor convincing, so i’m not sure how you’re in the definitive “experimental jab better than nothing” camp.
PS - Two doses here.