(And moreover, this has been true for all vaccines ever made: no vaccine guarantees 100% protection from its illness, but nearly all significantly reduce the severity of breakthrough cases.)

Edit: to emphasize: there are other ways to prevent severe illness from COVID, like monoclonal antibodies (at least, the ones that still work against Omicron). But none of them counter what you've posited (making pharma companies money), and none have as mature, reliable, and freely available of a supply as do vaccines.

“Breakthrough infections are not evidence that vaccines don’t work anymore than the fact that car crashes [that] are still sometimes fatal is evidence that seatbelts don’t work. We use prevention tools because they help reduce our risk of serious disease or death, not because they are guaranteed to 100% always keep us safe,” Murray [, an assistant professor of epidemiology at Boston University School of Public Health] said.