Not using those “bad practices” of third party analytics can be an existential threat to small businesses, unfortunately.

Not really. You can still get metrics and analytics, you just don't include PII in it. There are tons of privacy-respecting platforms/services (both self-hosted and not) you can use, instead of just slapping Google Analytics on the website and having to show the banner.

But even so, I'd argue that since it's a small business, you'd do much better with qualitative data rather than quantitative, since it's a small business it's hard to make choices based on small amount of data. Instead, conduct user experience studies with real people, and you'll get a ton of valuable data.

All without cookie banners :)

one must ask themselves, "why?", this never happens lol.