Earlier quoted context omitted.
This is nonsense. P/E is a measure of earnings against the price of one share. A high P/E does show that current earnings are small (or negative) in relation to share price, but there's no time component inherent in P/E.
There absolutely is. For a company to be valuable, it must return more profit to shareholders than they put in. The P/E ratio indicates how long it will take for this to happen.
If I buy a house, put in a pool, then sell the house for $100k more than I bought it a year later, it doesn't matter too much what the initial price was, except in comparison to other investments
You can always sell the Netflix stock after pocketing some dividends or something. The purchase price is not money lost, because now you have the stock.
I get P/E being important for someone trying to buy a company.