No, there is no repositories that hosts pre-compiled packages for everything on the AUR.
Unlike PPAs on Ubuntu, which is essentially something like "every users has its own little repos with pre-compiled packages", AUR is instead "every users contribute on one single, centralized repository, with build files so we can build the package on our system".
Although Arch and Manjaro doesn't have something that is similar to PPAs, it is possible to use third-party repositories. There is some for Arch (I am not aware of any third-party repository specialized for Manjaro, if someone has one, feel free to suggest an example).
In theory, you could even download a .pkg.tar.xz package file on the Internet and install it on your system, like you could download a .deb file on the Internet and install it on your Ubuntu system. The only case like this that I know is Mega Sync, the company behind it distributes a package for Arch Linux on its official website.
However, Manjaro and Arch users tends to prefer to use AUR over third-party repos or downloading .pkg.tar.xz files with a web browser.
At first glance, I don't know why it would break any kind of philosophy.
But considering that it is something like ~50 000 packages that would have to be maintained, there can be some technical question that will have to be answered, like how we would be able to build all of them to begin with, and how we will be able to maintain every 50 000 of them properly (in case of, for example, library upgrades) so it doesn't literally cease to work after a random system upgrade.
Now, there could also be some legal problems with it, with for example proprietary software that can't be redistributed according to their license.