The question you ask in the title is a more general one that you ask in the title.
Yes, Gentoo is a good choice.
No, it is not worth compiling every package. This should not be the main reason you choose Gentoo.
Admittedly, I started with Gentoo for the same reason (per-package compilation), hoping for performance gains. However, I stayed because of the excellent documentation, the great user community; the rolling versions; the customizability and control I have over my system, the choices I need to make when installing, and keep making as the install is continuously set up over the years.
I’ve tried quite a few distros over the (+20) years of Linux-use. I keep choosing Gentoo.
Syncing over iCloud drive works well (Obsidian, iOS).