To your question in bold...
The point is people don’t want to be sharing their space with people who could be carrying a larger viral load or a new variant of Covid that could kill us or someone we love because they haven’t had the vaccine. So we’d rather they weren’t allowed to be around us. As would other countries. Do you think Taiwan would be welcoming to letting Brits into their country if we’ve not had the vaccine? No chance! They’ll quite rightly tell us to get fucked, get real and get the fucking vaccine!
Due to being vaccinated, your immune system doesn’t allow the virus to replicate in large numbers across numerous cells in your respiratory system. Therefore, your viral load will be much lower and your chances of spreading a large viral load to somebody else is greatly reduced.
A lower viral load in someone else gives them a greater chance to fight it off without getting ill. And greatly reduces their chances of becoming seriously ill or dying.
A lower viral load also reduces the risk of the virus mutating because it isn’t allowed to replicate and evolve into a new variant.
Multiply this across the population, and the risk of spread, illness, death and new variants is reduced.
To the rest of your post...
LOL