I'm pretty sure he understands the difference... he's just saying that if it doesn't make the object immutable then it is not that useful.
(I disagree with him. I think minimal variables reassigning makes code easier to understand and 'const' helps to encourage that)
But he thinks that is not intuitive. It is intuitive as f**k is all I'm saying. It sounds ridiculous when you make something that fundamental as a base for your rant.
"So you wake up every day and think that you can go on forever? NOPE! We all die in the end! F* that sh**!!"