Oh dear oh dear Butthuber...more misinformation from you and your 2nd semester biology student
Viruses are continuously changing as a result of genetic selection. They undergo subtle genetic changes through mutation and major genetic changes through recombination. Mutation occurs when an error is incorporated in the viral genome.
Mutation give rise to about one mutant virus in several hundred to many thousand virus. Only mutations that do not interfere with essential virus functions can persist in a virus population (sometimes the mutation will kill the virus, so it never propagates). Mutations can be deleterious to the virus (eg slows down growth, makes it susceptible to antivral drugs) , neutral, or occasionally favorable to the virus. Increase its reproduction rate, make it more infectious.
Recombination occurs when coinfecting with other viruses exchange genetic information, creating a novel virus.Mutations can produce viruses with new antigenic determinants. The appearance of an antigenically novel virus through mutation is called antigenic drift. Antigenically altered viruses may be able to cause disease in previously resistant or immune hosts.
So some mutations cause nothing some cause the virus harm....burt some make the virus "better at its job"...and so worse for us humans.
So you are again wrong and it what us scientists fear...that Covid will change into something worse. More infections, a more deadly killer , we are still thinking it kills less than 5%, what if it killed 25% of ALL people it infected!!!