Remind you, NASA did Apollo project in Soviet Gosplan style, when all manufacturers were working on the same central plan, while USSR supported at the time form

Remind you, NASA did Apollo project in Soviet Gosplan style, when all manufacturers were working on the same central plan, while USSR supported at the time former Sergey Korolyov's team (Korolyov himself died in early 1966), their fierce competitors under Vladimir Chelomey and Mikhail Yangel's bureau as well, the latter leading to resources being distributed much less focused. That also allowed Zond program (Chelomey's Proton and Korolyov's Soyuz spacecraft) and automatic Moon explorers (Lunokhods and three sample return missions), so diversity did bring some fruits, but the manned system - which wasn't that far from working - was scrapped and Energiya-Buran project was launched. It brought results, but too late to be used with the terminally ill country.