My guess is search for toddlers, whose parents handed them a phone to keep busy while they rest or do something else. They’re the only demographic that does not know how to spell, or knows too few words to search effectively. But considering the American education system this could also apply to students who are illiterate despite completing the grade every year.
It is easy to implement, it’s hard to enforce because not everyone is going to be forthcoming. My city is rent controlled, passed by a healthy margin, but not all landlords are self reporting. The protections still stand, renters needing to present to the renters department at city hall.
But your point stands in more conservative areas which would be inundated with campaign donations, ads, and just overall lack of faith in functioning government.