Earlier quoted context omitted.
Yes, but that's just because I think for simplicity they created one large CSS file that is used for all their components and example pages. That's not very realistic. You're not supposed to do it like this for your own project. Instead if you use Tailwind CSS and PurgeCSS I'm pretty sure you would end up with ~10 or 15 kB of CSS gzipped, maybe less.
I'm tired of excuses for inferior tooling. If you truly know CSS, Tailwind is a waste of time.
See how dumb that sounds?