I wouldn't assume that the reason resistance doesn't last in some case is just due to suboptimal triggering, although as I said I don't know much of anything about vaccine development. I do often encounter people with inflated opinions of modern medical understanding that does not match reality, so I am suspicious that your claims are not necessarily grounded in reality. I'm also not interested enough in the topic to look into it in any detail. I do agree that it isn't necessarily impossible for a vaccine to cause lasting resistance even if direct exposure does not.