its called the death of the airline industry, thats what net zero is about, no one can have commercial flights as we seek to achive net zero.
If they carry on insisting fully vaxed people only then in 20 years when all the people who have had the multiple vaccines every year are all either dead or too ill to travel the only people left will be the unvaccinated.
The lower classed unvaccinated who stuck to their guns will now join the elite class who pretended they had the vaccine but never did.