There wasn't a lot of strategic importance to landing on the moon past the initial PR win of getting there first. We eventually gave up on moon landings too. Until recently there just wasn't a reason to go, and even now the biggest reason is mostly theoretic (possibility of H3).
Plus, what we learned after the Cold War is that the Russian program was basically just a lot of crap tossed into space that may or may not come back. They weren't really that far into space exploration.