I'm a little unsure about the relevance of your comment to this particular discussion, but my understanding is that after you've gotten COVID your immunity only lasts for several months. COVID vaccinations are much more durable in their effects, but are still, obviously, not 100% effective, although they DO reduce the severity of the acute phase. So my recommendation, amongst most doctors, is that you do indeed keep your vaccinations up-to-date, particularly if you keep getting sick with it.
As for LC, I, for example, finally got Covid a year ago after having been diligent in my vaccinations, and it was quite a mild case, but still resulted in LC.
SO, bottom line is:
WHO THE HECK KNOWS?