there should be a search function, so you can search for other users profiles. i usually have to click through so many things before i can get to someones profile, and this could clear a lot of confusion.
If you want to go directly to a profile and you know the name of the account, it is easy to do. Just go to your own profile, go to the URL and change the name from yours to the other persons. There used to be a search function back in the day that did something like what you want, but it was really wonky and ended up being taken off pending further improvements to it.
Go to google and type in the users name and it should come up sometimes you might have the type user name armorgames because some people might have the namke nickelbacksucks so just do that so we don't need a search function =)