This doesn’t work.
If it were only about novelty, then why aren’t there more bellybutton fetishes?
Being a fetish-having person, I can tell you there there is more than just an attraction to the object of your desire. It is a primal, deep, uncontrollable NEED to see or touch the object.
I am not a foot fetishist, so I do not presume to know the intimate details of what they like, but I can promise you, it has nothing to do with novelty. Fetishes have so many variants also; there are foot fetishes, sock fetishes, feet squishing stuff, toenail paint things, some want a footjob, some want to lick them or suck on toes, some people like big feet, small feet, the list goes on and on.
Maybe read just a tiny bit? https://en.wikipedia.org/wiki/Sexual_fetishism#Cause
Don’t forget, when people have time and a little extra energy they will do things like vote, volunteer, develop themselves, improve their health, maybe run for office.
These are all counter to the strategy to run everyone ragged, keep them on the treadmill producing and consuming until they drop. People who are exhausted won’t fight back.