Ham is a processed pork product that is cured using salt or smoking.
I find it strange that you say people should prepare home meals, but are against historically common ways of having food TO eat.
Kimchi, Sauerkraut, Blood Sausages, Hakarl. Pickles, Smoked Fish, Canned Veggies, Yogurt, Cheese, Ham are all processed products, made with lots of chemicals and designed to store for months or years without cold. Are all of these historically important foods objectionable to you?
Would SPAM be OK if it removed the ham? Its literally pork, salt and potato starch. I could make SPAM at home with a 5 minute grocery store run to buy salt, pork and starch, and sodium nitrate (or celery)
So once, again, what is your objection to this processing? Do you consider boiled pork mince, salt, celery juice, and starch excessive processing?