Yes, cutting 10% is something all mega-sized companies can, and probably need to do. Tell me why this is not helping, the stock price ??Generally, lowering headcount during recessions is not done so companies can "survive", it's done to prop up earnings/share prices and placate shareholders.
The most likely reason is Elon's insistently childish tweeting style about his "feelings" being "super bad" about the economy, a dour prediction about the future. Investors my fear there is bad new about Tesla's outlook coming ?
Hopefully, the market figures it out eventually and this results in a recovery of the share price.