Environment

version: fish, version 3.2.1
uname: Linux xibalba 5.11.16-arch1-1 #1 SMP PREEMPT Wed, 21 Apr 2021 17:22:13 +0000 x86_64 GNU/Linux
term: alacritty

The behavior I'm reporting still occurs under sh -c 'env HOME=$(mktemp -d) fish'.

Problem & Reproduction

The following keybinding correctly exits the shell when typing ctrl+t:

bind \ct exit

However, the following keybinding does not exit the shell when typing ctrl+t:

function myexit
  exit
end
bind \ct myexit

Why is this the case?