>> It's not for bad reasons that "trying to kiss a girl" has become so cringe.
Oh cringe, is it? I'd say your generation cringing at the thought gets directly to the reason it has no sex.
>> Why are you trying to do something that intimate when you have no clue how the other person will react?
Possibly precisely because you don't know how they'll react. Whoa, crazy right? You might initiate something without prior consent and see what happens? Holy fuck!
You aren't trying to do anything against someone's will. You aren't going to kiss the girl unless she wants to kiss you. But when you're 15 years old and you go on a first date, you do already know you'd like to kiss that girl. And you also know she isn't going to kiss you first.
It takes risk. No you don't take that risk if you think the girl doesn't like you, but it's still scary and risky all the same if you think she does. Having no clue how she's gonna react and taking a leap -- that's what you need to do to learn, both ways, to grow up. A lot of the problem with men not respecting women is down to men not learning when they aren't invited for a kiss.
But ya can't learn until you've tried. And when you're 15, trying to kiss a girl you like is pretty much the most important thing on earth. And if you don't know that, never experienced it or don't remember it, all I can say is I feel sorry for you. If you ever go on a date and carry through for a couple hours - and you're still interested, without thinking "how should I kiss that girl"? Then you're missing one of the better parts of life.
In any case, intellectualizing it to the point of obliterating all unplanned activity in the name of policing everyone's behavior and telling them they're dirty or wrong for kissing strangers is a victorian, petit bourgeois fascist little conceit which like most of your generation's ill-formed ideas will be trodden over by your children who are gonna go hog-wild fuckin' every cock in sight in return for your closed-minded, terrified little incel ideas about life.