Still, people went a good portion of the 20th Century and into the early part of the 21st Century without doing day of the first date confirmations. That's multiple decades.
For multiple centuries, we as a species pissed and sh-t wherever we happened to be standing or sitting at the moment, and didn't give much thought to operating in any other fashion. Today, we have a wide variety of options to choose from, some of which are:
-Just go ahead and act on our urges, without ever asking ourselves questions such as: "Might it be healthier, for both myself and the planet, to take advantage of modern sanitation?"
-Start a campaign to dismantle indoor plumbing, and return to the natural way of doing things
-Rejoice in the technological advances that have been made in sanitation, exploit them to their fullest extent
Similar is true of dating and mating. We can kvetch about how much simpler things may have been at some point in the past, and we can also put modern tech to use, text those we plan to get together with earlier in the day to confirm the appointment
As someone else on this thread stated, this stuff is only complicated, IF we choose to make it so