e.g. Bitter cassava is a staple crop in parts of South America and Africa. Unlike apple seeds, it contains substantial quantities of cyanide. It's a great crop because you can plant it and forget it. No need for fences. Animals won't eat it. A chemist would be hard-pressed to come up with a more effective method for removing cyanide from it than some of the traditional methods of cooking it. However, problems arise when people cook and consume it in non-traditional ways.
Traditional knowledge can be both constraining and protective. It's like a fence whose purpose you don't know. Tearing it down is a gamble. You might win. You might lose. It's probably not a bad idea to try to figure out why a tradition is there before you mess around.
Many of those are traditions or ritual behaviors that decrease the chance of poisoning, sometimes subtle chronic poisoning rather than obvious acute poisoning.
Interestingly, I think the rest of your comment supports exactly the opposite message. Traditional food preparation is the way it is for excellent reasons, that's true.
And what's also true is that you have absolutely no hope of determining what those reasons are. You can mess around and see if you get problems. But if you don't do that, you'll never have any idea what's behind the traditions. Investigating the question before messing around would be a gigantic waste of time and effort.
Yes, apple pips do have a tiny amount of cyanide in them (but why)
This is a from a reasonable source and relates to cherries: https://www.bbc.co.uk/news/uk-england-lancashire-40738573
I think we can assume that apples and cherries are OK to eat. Apple pips are fine and why on earth would you want to crunch through a cherry stone.
Black cherries (prunus serotina) I ate a whole bunch of during late summer. Much smaller than the Prunus avium (sweet cherry) which ripens around early June here. Allegedly the fruit does contain the cyanide producing compounds but without the enzymes. The catch is if you chew the pits (or eat the leaves/stems) it is poisonous. Poisons a lot of horses and other livestock: https://horsedvm.com/poisonous/black-cherry-trees
As linked in the original article - says 150 seeds to a few thousand depending on the apple variety.
https://itdoesnttastelikechicken.com/banana-peel-bacon/
Sounds simple enough - is there anyone who has done this? Bacon is a hard one to replicate!
That's alright, but then grass and pebbles are also edible.
Just because we think you shouldn't do something doesn't mean you really can't is the takeaway I guess. We don't normally eat apple cores but you could and you'd be perfectly fine.
That “properly” is doing most of the heavy lifting there. The reason i would be weary of running the dishwasher with a toaster inside because i would worry that liquids trapped around thin electric conductors will corrode them. In othet words toasters were not designed to be easy to “properly” dry them out. And that damage might not be appearant right away or after a single wash.
In fact i wouldn’t trust the professor’s claim that the “toaster is perfectly fine” unless the professor conducted a lot of experiments. And even then i would only trust it with the toaster models he tested the claim with.