I was about to say this, almost word for word, plus my novel theory is that Omicron seems mild as it seems is because of vaccination pressure, and I'm afraid if we let it thrive without any external pressure that newer variants might become deadlier again, I think that the idea that viruses ALWAYS evolve to be more contagious/less deadly is horseshit, all living things seek self-actualization once their existance has been secured. Omicron became more contagious/less deadly because its chances about spreading were greatly reduced, but you always evolve one aspect at the expense of the other (human eye would be a good example of what I think, it adopted to seeing in the air at the expense of seeing in the water, even though some atavistic features of water-seeing remained).