They don't but you can still format things in an actually readable way and be nice to people.
People also often us _italics wrong_, just coz it works that way elsewhere. Works totally fine with a "*" instead on here. Just go with the program and you can make beautiful posts even on here. Heck you have AI now so you don't even have to remember anything any more. There's even a `help` link next to the input box and just to write this I double checked it and I was even misremembering and using two too many spaces for monospace! I really do wish `these would actually work` but hey, you really can't have everything!