[MattPalmer1086]

Not really. Evolution just causes viruses to optimise for their own spread.

Often that selection pressure works towards less dangerous variants because that gives them more opportunity to infect others.

Sometimes a virus kills off everyone who is susceptible to it. So it's now less dangerous to those who remain.

In the caae of Covid, it is infectious long before it kills, and so there is no great selection pressure for it to become less dangerous.