Why do you buy a used car which is so expensive?

I've been looking at 2017–2019 used cars with around 70K–100K miles. It probably depends on the model and trim, but used car prices are so high. If I spend just a few thousand dollars more, I can buy a brand-new car, even if it's a lower trim level. It really makes me wonder—who's buying these almost 10-year-old used cars at these prices, and why?