Again, you are bringing up some valid points. And we need to have these discussions because I think a lot of couples struggle in this gray area of dating.
But personally, I am crystal clear from day one that I am not looking for anything “casual” and I am a big fan of that scary word - monogamy.
I don’t fault anyone for going on multiple dates. This is how we find the most compatible person. But I have no interest in dating someone who has a girl in every port. That pushes my comfort zone. It’s far too easy for these people to get into situations in which they are sleeping with multiple people and the multiple people don’t know. Yuck.
Again, no judgement if that is your way of operating. But it is not mine. And if I make that clear to someone, I expect them to be honest and not cross that boundary.