Scrum is so woefully misunderstood.
It makes sense for small teams (yes, those 4-5 devs), if — and that's a big if — they work together on a single product. It is intended for developers to coordinate with each other, and also provides feedback loops for reality checks and for improvement of collaboration.
If those 4-5 developers work independently from one another, don't have to coordinate, don't need business to tell them what, out of various options, is the most important thing to work on right now, and don't need feedback from users to correct them along the way, then of course they don't need scrum.
