We all know the pictures of the astronauts on the ISS floating around. We also suspect that a lack of gravity is bad for the body as the muscles go weak and such.
Why don’t spaceships just rotate to cause the effect of artificial gravity through centrifugal forces?
It is primarily the latter reason. Rotating e.g. the capsule of the Artemis mission in a way that would produce enough fake gravity would be… interesting. And the astronauts’ feet would have gravity, while their heads would not.
Yeah that is a large part, but I don’t wanna minimize the other parts, because they all mean you need a significantly larger vehicle rather than “just” a counterweight.