When you're using lemmy or mastodon, you don't have to use the website. You can use an app that goes from your fingers to the server without needing a browser and a website to exchange the information.
So most if not all the instances of the fediverse are also a website if you need to use it. But not every website is an instance of the fediverse.
It would also make more sense to divide the day into something decimal but some base twelvers showed up first. It would also make more sense to stop using measurement systems where 12 hooplas equal 1 boink. The alphabet is just another thing like that. It's been stolen and rewritten and now we are stuck with it. You can write an alternative sound map to help new learners. But the 26 letter order is here to stay.