Who said anything about hardcore pornography? 2 people having consensual romantic sex is still porn. Nothing wrong with educating a kid how sex works by showing him/her a video of that.

At some point later in the years, the kid will probably stumble onto some hardcore porn, but if you contextualize it properly, he/she will understand that its not how real relationships work.

In the same way, its ok (and probably good) if your teen tries weed/alcohol under your supervision, with the proper education around it, but you aren't going to give your kid like a heroin injection just because he/she is curious. But the fact that you establish trust and educate your kid about drugs that he/she will certainly come across is the more important bit about them staying away from harder drugs. Instead of outright ban, and then kid discovering how good weed makes them feel, and then going out and trying harder drugs.

Like I shouldn't have to explain this basic concepts to people. Really makes me worry about all the parents raising their kids these days.

Sex ed provides context to pornography. It doesn't compare but it sets a baseline as to what's normal and what's fiction.

I'm sure none of my school peers thought bukkake sessions were actually normal behavior even though they would have been aware of them.

I think in a world in which teenagers have a realistic/healthy view on their sexuality and human sexuality in general is a world in which they are capable of inferring that what can be seen in porn is unrealistic, most of the time demeaning, and not something to be idealised.