The largest non-voting registered group in the 2024 election were those associated with neither party: independents and unaffiliated voters.
About a quarter of eligible voters aren't even registered on top of that.
"Both sides are bad" statements aren't necessarily driving partisans to not vote. They are, or can be however, an important message for those two big parties running the elections to hear from the people.
It's also, possibly one of the few talking points that forces acknowledgement that those independent, unaffiliated, and unregistered voters exist and whose interests might matter towards the outcome of policy and/or elections.
But yes, the interests that align with at least the GOP are furthered when votes are suppressed, that has been demonstrably true for decades.

