Random pho restaurants (or whatever) are usually literal mom-and-pop shops and asking these people to put up (and maintain!) a website is usually too daunting for them. These are the places that tend to end up with only a facebook page or an insta.

It's just too hard for normies to DIY, and local "web dev firms" are usually predatory in their insistence on making decisions that require ongoing maintenance, because recurring revenue.

Just try to get your local web design firm to build you a static html-only site and hand you the creds for all the hosting, etc.

What random hair salons or coffee shops need is basically github pages with bring-your-own-domain, WYSIWG editing that works on mobile, and zero git. but AFAICT no such service exists.