So say you're browsing the Source library in the Launcher, and you find a material you want to download. You didn't realize you were not logged in (which is another problem altogether - logins are not persistent no matter what I try).
So when you attempt to download, it tells you you must be logged in. So you click on the pull down menu at top right (account icon) and login.
After logging in, it takes you back to the default view of "new assets". Now you have to try and find the material you were attempting to download. And if you didn't make a note of the name, you have to spend more time digging it back up.
Wouldn't it make more sense if it just returned you where you were?
Now I'm off to try and find the material I was attempting to download.