I mean, squarespace and similar services exist. Sure, there's a fee associated, but compared to even the costs of running a small coffee bar it's negligible. I could understand this argument in the 2000s and early 2010s; setting up a website meant engaging with a web consultant or similar IT agency, and there were yearly maintenance costs. It wasn't out of reach for most businesses, but it was expensive enough that a Facebook page was a genuine cost savings.

Anymore, putting up a basic template page for your business is maybe 2-3 hours if you're really non-technical. Sure, it will be just the basic template, but there's very little need for more customization than that. That hypothetical coffee bar really just needs a place to post hours, their menu, and maybe update with specials if they're ambitious. That's about all you get with a Facebook page anyway, there's zero customization.