A more general statement on "useless".
Saying that something is "best at the end" doesn't mean all that much.
1) Not everyone is looking for "best". "Good enough" is frequently.... well, good enough. :tongue:
2) To get to "the end", you need to play through the beginning and middle. Just because something is best/good "at the end" doesn't change that it might be not what you want in the parts that come before.
...and that's ignoring the whole part where people judge items by varying standards. Some value aesthetics more. Some value weight more. Some value armor rating more. For many, it's a combination of these factors.
(FO:New Vegas, for example - I tried to wear Reinforced Leather as long as I could, even though I had access to better armors. Why? Because it looked great. Eventually, though, I had to upgrade, because with the DT armor system, it just got to be too weak compared to the enemies I was fighting. But I've never worn Power Armor on any character in either FO3 or FO:NV. It's just too ugly.

)