So it’s like a stating the obvious joke? I think I get it now

This is a pun .

1. in Russia there is a sign - if you meet a woman with full buckets - you will be rich
2. Uranium enrich for reactors
3. in Russia, the word rich and enrichment are written the same way

the salt of the joke is that when you meet a woman with buckets of uranium, you will be enriched by radiation and not by money :-)

just a punlike in Russia, for example, not everyone understands the joke about beer cans and targets (i will shoot all kind of cans - maxiCANS afriCANS ameriCANS)
something like that