Is there a point to invest in retirement accounts if you never plan on retiring?

I helped my 28 year old brother open a ROTH account and buy VOO, and encouraged him to try his best to max it every year. He and the rest of my family are barely above the poverty line and frankly don't expect to ever retire or build meaningful wealth. They'll probably work until they're physically unable, then live a poor life on social security.

The couple grand a year he could contribute would probably turn into a couple hundred thousand dollars, for sure, but it's not like he'd be able to live off that amount. With that in mind, is there even a point in him contributing to a ROTH if he likely won't be able to build meaningful wealth or retire?