Facebook is good for updates
Facebook is useful for posts, photos, community activity, and customers who already know where to look.
It is not always the fastest way for a new customer to find hours, services, phone, directions, booking links, and basic trust signals.
A website is good for the basics
A simple website should be stable, easy to scan, and organized around what customers need before they call or visit.
It can still link to Facebook, Instagram, Google Maps, Booksy, Fresha, Square, or any other tool the business already uses.
Use both
The practical answer is not Facebook or website. It is Facebook for fresh activity and a website for the clean front door.
Customers should not have to scroll months of posts to answer one simple question.