It all comes down to timeframe. If you are very short term, days like yesterday can kill. The longer the time frame, the better the ability to weather.
My TSLA is in a retirement account so I dont worry about any of this noise. Instead, just focus the business they are into.
They are my 'anchor' stock in my options trading portfolio so I just ride the waves and make some juicy premiums each week, but a 14% drop in a day because of an ego battle can shake the nuts of any hard core investor, lol.