The people who say "skip Fallout 1, Fallout 2 is better" are insane, Fallout 1 is so much better then Fallout 2.
That divides even the old fanbase. I, for one, consider Fallout 2 to be slightly better even though Fallout 1 has much better writing - it's a close call though, and I would most definitely
not suggest skipping Fallout 1 and start from 2.
And on topic: Yes you should play them, if not for anything else, then just to see from where it all started and how cRPGs used to be before the massmarket appeal and overabundant streamlining.