Sure, you can do all of the things that it does in more custom ways assembling and using those disparate pieces yourself. Sure, it is probably less efficient on disk space and resources as it uses a variety of software installation approaches including Flatpak. Sure, its Windows compatibility is just Wine. Sure, it’s hard to find info on the main product page about what it’s actually running. None of those things matter when you want a computing system that is polished, free, and lets you start being productive instead of managing your system. If that’s not for you, don’t use it! You’ll be fine.