Nobody said anything about "exploring" fonts in the Font menu. If you have to change a font, you have to go into the Font menu, and if the font you want to use is below the Noto fonts, you have to scroll forever to get to it. And having to scroll through a bunch of Asian fonts (when you never use them) is highly annoying.
No font manager can fix this problem because the fonts in question reside in the System which cannot be edited or messed with in any way due to Apple's insistence on locking the System down for safety/privacy concerns. It's the one thing I miss about older versions of the macOS.