I'm a proud carnivore, yet I would gladly switch to synthetic meat when it is similar in taste and cost. There's simply no reason not to.
You don't take nutritiousness into account, or are you merely assuming that if it has a label that says "healthy" then it must be nutritious?

I also take various supplements (pills, nuts, seeds, etc.) to meet 100%+ of all 29 USRDA recommended levels of vitamins and minerals. 100% carnivore-only would be seriously lacking in micronutrients, so let's say I'm 99% carnivore.