None of them has something that can compare to the app store, play store, or even the Microsoft store

There are lots of reasons someone might choose Windows but...this ain't it. The Linux app managers are way easier to use, require no account, and aren't full of ads and malware.

Average users are fine on Linux. I set up my parents on it and they are able to launch their browser, email, etc and not bother with terminal. They didn't have trouble adjusting from Windows and MacOS to Linux.

Only ones who have trouble are those who rely on specific software for work like Adobe or gamers who can't go without certain Windows only games. But, average non gamer and non professional who wants to just use it for basic tasks are fine.

And depending on the distro like ones with long term support the UI isn't going to keep changing up on them.

I don't know, I installed Bazzite on my parents' PC and they don't use or need terminal at all. Same thing for my aunt's laptop with Aurora. I don't even give technical support anymore since I installed these.

When I was in the process transitioning my lab from Windows 10+11 to Linux Mint, I was spending more time in Windows' cmd.exe attempting to debug issues introduced through Windows Update than the Linux Terminal.

Ehh, i agree with that appstore thing and simple to install .exe, but Shelly can basically do most of those now, and that isn't even the thing that hold back the transition. People still using windows because software dev doesn't make it for linux. Software like POS, professional design suits, game dev tools, all mostly run on windows. Those people also use whatever the newer windows available, including win8 that most people hated. For gamers? None of those matter. People like me shifted to linux and did not find any difference in everyday use.

Also i don't really interact much with terminal, 1 or 2% of the whole time using it i think? It's to both setup auto mount(none of the option in the setting works, they need to fix this shit) and also updating cachyos software, which is 99% automatic and 1% y and enter, to the point i feels like it isn't even considered a terminal. In fact i avoid doing anything with terminal because i despise it, yet i can use linux without too much of an issue.

Edit: i tried mint+cinnamon and currently using cachy+kde, both have the same experience, and i don't need terminal to install anything.