In that world, males and females should be mature enough to make their own arrangements for tachlis purposes.
Why? Because it makes you uncomfortable that we successfully marry with the parents taking care of the checking, we should change? You can make up whichever rules you want – if you’re not old enough to be President of the United States, you’re not old enough to get married. It’s meaningless.
Some shidduch crisis wacko took out an ad saying “if your son is ready to go to Eretz Yisroel he’s ready to get married”.
All these “rules” are ridiculous. You could be ready to get married but not ready to do the necessary investigations to make sure the prospective spouse is suitable. You could be ready to go to Eretz Yisroel but not to get married. Don’t make unnecessary equations, judge each thing in its own.
BTW, it’s the older singles who need the dating coaches; most get married within a year or so of starting to go out, without needing it.
I’ll bet there are a whole lot more older singles among the crowd that does things your way than in the crowd which dies things my way.