The Moon research was significantly advanced with the data collected from the rocks Apollo astronauts brought from the Moon.
Your skepticism is widely shared and also widely debunked. I don't think we'll move the state of the debate ahead with short messages, it needs more detailed and prolonged discussion. There are reasons defending the space exploration, and there are reasons defending human flights. You can personally disagree, but your arguments are based only on opinions, which aren't better than opinions of the other side.
In the 1960s it would be hard to retrieve samples from the moon without humans. I don’t think that’s true today. For mars, isn’t it obviously much more difficult to try to get a big enough rocket to return a load of heavy meatbags than to just return the rocks and leave the robots behind?
Your skepticism is widely shared and also widely debunked. I don't think we'll move the state of the debate ahead with short messages, it needs more detailed and prolonged discussion. There are reasons defending the space exploration, and there are reasons defending human flights. You can personally disagree, but your arguments are based only on opinions, which aren't better than opinions of the other side.