But when not eat healthier in the meantime?

Listen, it’s better to prevent cancer than to have to take some special metabolite drug of vitamin A for a gazillion dollars to cure it, isn’t it?

The ACE-inhibitors are modifications of a substance found in the venom of Bothrops jararaca, a South American pit viper. Scientists observed that when a prey animal is bitten by one of these snakes it experiences a sudden and profound drop in blood pressure (ideally to zero, from the snake's point of view).

You could argue that allowing yourself to be bitten by one of these snakes would somehow be more "natural" than taking a pill, but myself, I'm going to stick with the pill. :-)

While perhaps not as dramatic, vitamin A is also quite toxic in large amounts. Some of the early polar explorers came to grief from eating sled dog livers or other animal livers.

There are many other ways to control high blood pressure as well, and one of those includes diet.

Not at all.

You: taking Vitamin A in a pill is unnatural. You should get it naturally, by eating organ meat (at the potential cost of getting sick from Vitamin A overdose, which is something that actually happens).

Me: taking an ACE inhibitor in a pill is unnatural. You should get it naturally, by allowing a snake to bite you (at the potential cost of dying from the snake bite).

There's no "false equivalent" here. The statements are exactly analogous.