The End of the Chamber of Secrets

(Spoiler alert for Harry Potter)
Do you want to know how much my mind was blown?
At the end of Harry Potter and the Deathly Hallows, Harry is killed by Voldemort... and doesn't die. What? Dumbledore explains it to Harry... and it's still super confusing.
I saw a question that J.K. Rowling was asked on Twitter. About the end of Deathly Hallows. Voldemort clearly killed Harry. But he didn't die. I guess "After all this time" we still don't get it.
(Ten house points to whoever caught that reference.)
And J.K.R. said, who seemed very tired of answering this question, that if someone tried to kill Harry, he would not die, only the horcrux in him would. So Harry would just become mortal and vulnerable again. The next time someone tried to kill him, he would die.
Okay, okay, I see. So a killing curse, that magical fire stuff (Can someone help me remember what it's called?) or basilisk venom would only kill the horcrux..... WAIT WAIT WAIT stop the train. Basilisk venom? Let's go back to Harry's second year at Hogwarts, when he almost died because he got stabbed with a basilisk fang. That was the closest Harry had ever really come to death. He didn't die because Fawkes used his magical tears to save him.
But wait a minute, now we know that the first time someone tried to kill Harry after he got the horcrux put into him, it would only kill the horcrux. Does that mean that Fawkes's tears actually healed the horcrux? And even more importantly, if Fawkes had not saved Harry Harry still would not have died.
Just think of how different everything would have been! Think of how much sooner everything could have ended! Harry gets stabbed with a basilisk fang... but doesn't die. And nobody can make any sense of that because it is common knowledge that basilisk venom is deadly. Nobody except Dumbledore. Dumbledore knows but Harry is still too young to completely understand. The real question is how long can Dumbledore keep that information from Harry? I think if Dumbledore doesn't tell Harry at the end of his second year then he will have to tell Harry in his third year, because Harry is just the most stubborn child at all time, is willing to do anything to figure something out and has two best friends that are just as willing as him. And when Harry finds out and has to go on the horcrux hunt, he is super undertrained. At that point he would only be thirteen years old! But then again, Voldemort would not have risen to power at that time. Who knows how that story would end.