@coyote @Terry
>*responds*
Viruses don't "respond". Do you even understand evolution by natural selection?
What you're referring to is literally the act of environment pressure providing the means of selecting in favor or against certain mutations. Thing is, these mutations still happen, with or without the vaccine. You select for them by eliminating the standard variant, but it doesn't mean they don't develop otherwise. And as long as the variants are more infectious (and they are), they'd still become the dominant version over time.

By vaccinating, all you did was reduce the number of people who get infected or severe cases of standard Corona-chan, helping people recover a lot faster, and providing any potential infection much less time to develop mutations in the bodies of vaccinated people.
Meanwhile, the actual variants people were scared about, literally happened in countries that had low vaccination rates. Remember the British variant? Remember how Britain tried to do natural herd immunity? You think India is a heaven of medical accessibility?

Yes, maybe mutated variants might get past the current vaccine (although last studies I've heard still showed that most vaccines are still very good against Delta), but those mutations would have still existed, with or without the vaccine.