Generally that's where the line Fallout 1/2 and Fallout 3 is and where alot of inconsistancies lie.
With Fallout 1 and 2 Energy Weapons and Power Armor were crude and were essentially just being introduce. For instance, the Laser Rifle. The Laser Rifle was essentially a portible industrial laser, and it was hard to find.
With Fallout 3 there's a stark contrast. Fallout 3's Laser Rifle was specifically designed for military purposes and was fairly common.
Think of it this way, DC is the capital, wouldn't they have more military things there? I mean, the brotherhood of steel had a very large base there, although it was minor in fallout 2. Few bunkers here and there.. Whatever...
I think what they aimed for was ungodding the power armor. In fallout 2, most enemies couldnt hit you for more than 10 hp with Advanced Power Armor, and all you had to do to GET that armor, was walk past 2 guards who just totally let you in, then take it from a locker.
I don't like the hostility aimed towards F3, F1 and F2 did weird things, but them being the first games made them 'canon'