Per default, Astro generates static pages. So it makes sense to compare it to an approach that doesn't.

Using a framework has upsides over writing static pages manually. Most notably, you can decompose your website into reusable components which makes your implementation more DRY. Also, you can fluently upgrade to a very interaction-heavy website without ever changing tech or architecture. But that's just what I value. I whole-heartedly recommend trying it out.