Lord Haseo said:
Well if Vader could manipulate inanimate objects then it is logical to conclude that he could do it to a living being. There’s nothing much that differentiates them; it’s just mass you know.“Luminous beings are we.”
“Luminous beings” still have mass and it doesn’t negate the effect other forces have on it.
He was saying that Vader wasn’t actively fighting when he threw the objects at luke, and he’s correct. Vader was either simply holding his saber down, or was holding a block.
A saber lock is still fighting as both people are trying to gain leverage. They’re still technically fighting.