Next time ask how long they've been doing Uber. For the most part, I've only heard longer than 1 year a handful of times.
Which completely destroys the top comment's point, if true - if one only does gig thing as... well, a temporary gig - there's no reason to worry about retirement with gig salary - nobody retires relying entirely on gig salary.
Anecdotally, I've met a number of Uber/Lyft drivers that told me driving allowed them to quit their past shitty job and choose a flexible schedule that worked well with raising their kids.
Also, drivers that quit their jobs to pour energy into their family business with some extra cash from driving when needed.