No, everything that is free can be downloaded without account. It's actually the only platform I'm familiar with (android, iOS, MacOS) that allow users to do so. Really convenient for computers that we install at costumer site.
Seems that MS distinguishes between a desktop/laptop install and a tablet install.
I have a cheap 8" x86 tablet i picked up, and there i have to log in to grab even free apps. But if i use my laptop, i can grab free apps without logging in.