Why doesn't `ssh -t hostname_B.local -- zsh --interactive -c echo "this works"` work?

Question

Why doesn't this work?:

hostname_A ~ % ssh -t hostname_B.local -- zsh --interactive -c echo "this works" 

Connection to hostname_B.local closed.
hostname_A ~ %

Blarrrrrrfrustration.

Answer 1

Because it should be:

ssh -t hostname_B.local -- "zsh --interactive -c 'echo this works'"

Which does work, like-a so:

hostname_A ~ % ssh -t hostname_B.local -- "zsh --interactive -c 'echo this works'"
this works
Connection to hostname_B.local closed.
hostname_A ~ % 

Yay!

(Good luck dealing with the insanity of string escapes in bash-like syntax, though. xD )