Cooking isn't baking. Recipes with a mix of languages are usually better. Those units are fine for home use. Recipes, as algorithms/programs, are meant to be run, and iterated on. If you do make them, you can also weigh out all the ingredients in grams for future cooks if you want more exactness, discarding volumes and multiple units.
Yes and a lot of things like stews, sauces, soups, etc you can lump together as "peasant food" that had variations in how you prepared it based on what you had left over.
The idea of combing through dozens of recipes, formulating a precise grocery list, and shopping with the intent to cook that one exact dish is very much a Type-A modern day phenomenon.
How many tomatoes go into the sauce? However many bruised ugly tomatoes grandma had leftover. How much meat to make it a meat sauce? Whatever leftover cuts from the roast. Etc.
Improvisational cooking was much more the norm. It is also how you avoid food waste.
