Ok. I will bite

1) Pragmatically -- As someone who spends a lot of time with "totally disengaged people", they are generally lower income, minorities, & in theory the voters progressives have an opening to & so can win elections. If they really are the party of the working class

2) Morally. Paying attention to "totally disengaged" or disenfranchised is ethically right thing to do & thinking they should "get with it" is a trad conservative/elitist stance along lines of, "just work harder"

If that is your position, fine. But it is hardly progressive

Voxtopia is a billion disenfranchised people crammed into dense urban hellscapes commuting to bug slurry factories on Monorails built in Bangladesh fire-traps lorded over by 5,000 Harvard graduates who passed the new voting test as mandated by the Political Awareness Act of 2040

Anyways. Here you go https://americancompass.org/the-commons/the-non-voter/