Once you start to get into the "intermediate power" range, occupying levels 7-14 in most WRPGs, Fallout 2 is more forgiving on the player, but in the beginning???
Fallout 1 started out out the vault door with the 10mm Pistol, some Stimpacks, flares and some misc equipment, whereas Fallout 2 starts you off battle scarred from the temple and sends you out into the world with a few spears and some healing powder. In Aramath or whatever the first settlement you reach before the Den, the best gun you can get is a goddamn pipe rifle, which costs you the skin off your back. (Money better spent on Sulik)
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Aside: I love Fallout 3, but one of my major gripes with it was that Super Mutants and Enclave soldiers are not the fearsome "Oh fuck, I'm screwed" enemies they were in the original games. Even at high levels in Fallout 2 packing power armour and a pulse rifle, you will NOT likely survive a skirmish with an Enclave patrol.
Basically, I just felt they kinda defanged some of the coolest and scariest enemies and nerfed them down to above-average threats, instead of SERIOUS threats. At least the Deathclaws could still wreck your shit.
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Basically, while Fallout was never "realistic", the original games were more realistically difficult in that a new character might be able to take out a raider, but not a posse of them. Similar logic for higher level threats and characters.