i had just woken up when i posted this comment so I apologise for being flippant.

actually reading the post, point 3 is perfect. i actually do have “lunch-dessert” and ive had it all my life, never really having “dinner-desert”

so honestly, i like the question. “how did a sweet snack before bed become a cultural norm in the western world, and why/how did it beat out another, more optimal, point in the day?”