Sometimes I’m up at 4am and want to send a message to someone at a reasonable hour when they’re not going to be in Do-not-Disturb mode, seems like a good enough way to accomplish. I use Slack “schedule tomorrow for 9am” pretty frequently for the same use case.
I use it more as a reminder system. Someone tells me to checkin next week or in a couple days and I can just schedule the text right then so I dont forget.