Some countries won't accept a person if he's not vaccinated. They may accept it but it's also requiring some RT-PCR or any test that they prefer.
And sadly, it is going to be shouldered by the person traveling. Well, that's a benefit and perk if you're traveling, you're going away from that expense. But there are still some countries that even you're vaccinated, you're required with those tests.
I just want to live a life that there's no test, no vaccine and we're all free to travel without any hassle and worry.
Unfortunately those times are gone when you can just travel anywhere freely. Now you need to have the covid certificate to travel anywhere whether inside of outside the country.
Although it is not mandatory for domestic travel in most of the places, but soon we will see covid certificate become a necessity to avail every privilege.
For the meanwhile, I'll travel more with picturesque view in my country until that requirement is lifted.