Earlier quoted context omitted.
Is there anything wrong with waiting to have sex with someone you're invested in? I've found those types of experiences to be worth it, long-term. It's interesting that some see that as naive--it's the opposite if anything. Easy sex is fun but it would seem hard to invest in anyone but myself.
I'd say it depends on if it's truly what you want or if it's something that society wants from you. Too often these ideas are societal norms rather than our own opinions. Notions like "waiting for Prince Charming" or the one things like purity rings are a symptom of in my opinion are indeed naive and against human nature.
But we are talking strictly about the ability to have fulfilling monogamous relationships, not the validity of "prince Charming" narratives or purity rings.