Fewer disease vectors (the teens that avoid infection due to vaccination) and smaller disease vectors (the teens that get less sick) leads to less spread.

So this justifies treating teenagers the same way as 60 year olds who are not willing to get vaccinated and actually have a high risk on ending in the ICU? Even worse, a pensioner can live quite well with the new restrictions while the teenager's family is not even allowed to meet other families anymore. You can twist it all you want, this is absurdly inhumane (and in stark contrast to the federal vaccination commission's recommendation).