It’s easy to use the simplest possible stack on a personal project. You set the requirements and you will probably end up setting requirements that work with that stack.

On a professional level, the requirements may mostly be for a basic CRUD app but it will have a few requirements for interactive or real-time features that are not possible with a static html crud app. The client is not going to want to hear your hacker news spiel about how JavaScript has ruined the internet. Now you’ve got to embed mini SPAs into your static html, and you’ve increased the complexity past what it would have been had you just used a SPA in the first place.