Who cares, let's talk about morality.
Our favorite social said this today
"Dangerous", "counterproductive" are measurable. "Moral" is not. It's merely a rephrasing of "my mum/teacher/priest thought it's right and told me when I was a kid and I never had the brains or time to question it".
As you can see, what we have here is someone who cannot see that morality comes in three flavors: shit someone made up, practicality that you can't yet see, and outdated ideas. This is a slight oversimplification, since these can blend and merge; an outdated idea may be resurrected and combined with shit someone made up to create a hybrid idea of unique uselessness.
Shit someone made up can covers things like religious justifications for racism. It's not a useful idea and it never was. Instead it's just shit that someone made up.
Outdated ideas are moral codes which were useful at a time but are no longer needed. For example, food restrictions, such as avoiding pork or certain seafood, can help avoid disease which was not always easily prevented or treated. These days we know how to cook properly, thanks to recipes, fire, and not wandering in a desert for 40 years or 40 generations or 40 generations of 40 years. 40 something.
Then there is practical morality. This I define as prevention for actions which trigger harmful or wasteful results. That made no sense, did it? Let's try theft for an obvious one to demonstrate the principle. Why should I not steal? Well first off, the theft may involve property damage, a harmful or wasteful result. But I can steal without causing damage, so that's insufficient. Instead the problem is that theft encourages wasteful responses: barbed wire fences, bars over windows, and rental cops. These are entirely worthless except for stopping thieves, so the thieves have not merely taken what was not theirs, they have also triggered a wasteful response.
This could be extended further, to cover things like fraud, lying, murder, war. All of these trigger unproductive responses as we try to protect ourselves from these actions. We might even venture into the production world and regulate toasters to ensure that they do not frequently catch fire, since such an object would trigger the otherwise unproductive response of men in rubber suits spraying water on houses.
This leaves out something important: what is productivity? In response I shall wave my hand, say "something about happiness", and claim that's for another day.
Short version: there's more to morality than blind adherence to pointless rules taught by the previous generation.
Now to tie in the cooking. We use recipes because previous generations have figured out practical ways to organize and cook foods. If we looked we could see all manner of practicalities behind the recipes; the way adding an oil to this otherwise fat-free food helps with absorption of vitamins in it, how a mix of beans and corn provides a better protein mix than either by itself, how cooking foods in certain ways will remove poisons and add nutritional value. These are old lessons which are useful. But ingredients change, so sometimes we need to tweak recipes. Maybe we don't have enough wheat flour, but oats in a blender can help substitute. And maybe the recipe for fried lard dipped in lard can be thrown out.