> Layoffs are a strong signal that a business is not investing in growth and is just trying to wring more profit from the same thing. If investors were rational, they'd walk away.

Not always. A buggy whip maker in 1920 should be laying off people. No amount of investment in buggy whips will bring that market back.

A layoff is saying that the investment will not pay off. So long as the company is cutting the right things they are good. Many layoffs are not done with a proper cut of the work do be done and so are bad, but that doesn't mean they are always bad.