@trulydelicious Someone who is not vaccinated should not be on a plane. It's very easy to pass infections on there. It's possible the vaccinated can pass on Covid, but by no means certain. It's not a major problem with vaccines, which is why a good vaccine can stop an epidemic.
The unvaccinated traveller may be infected, and if so, will carry the Covid infection to people who are unvaccinated for valid health reasons, which will put their lives at risk, and also risk starting off another round of infection. The more the infection carries on, the greater the chance of a mutation arising that is resistant to the current vaccines. Back we go into lockdown, deaths and all the rest of it.
I guess it's a matter of individual choice, but people who refuse to be vaccinated without a valid reason reduce herd immunity, and are a potential hazard to the health of others. Therefore, there will be things they shouldn't be able to do. It's a bit like your having the freedom to drink, but not the freedom to drive a car once you have done so, because you are putting others in danger.