P/E matters when growth has stabilized and there is a transition to cash cow and return to investors. P/E is also a bad way to look at a company that is experiencing negative growth, for example $BP and $IBM.
You also look at Revenue Growth Rate - There are multiple years of high double digit growth ahead of it, even if you don't think so.
Balance Sheet is strong because there brand is so strong, and the execution has been so impressive, that they are literally able to print money and they don't have any debt. Billions of dollars. That means their cost of capital is virtually 0. That is a strong company. Most companies cannot do that.
Stupid to chase stocks like this. It will probably have a 40% drawdown again, but it will then have new ATH. Don't bet against $TSLA.