It's a metaphor about dealing with loss. How knowing something is coming allows people to cope more effectively. If your interpretation of that metaphor is that he is saying Elon's move is worse than or similar to his mother dying I find that much more distasteful than anything he said.
I understood the metaphor, but I still think it's distasteful to evoke your recently dead mother in a hateful post full of slurs and titled "The Shit Show".
