If investors value well run companies (those who treat their employees well) … you can assume a couple of things. a) investors are stupid and employee enthusiasm for their employer has nothing to do w/ company performance, or b) enthusaistic employees (happy) are more productive, innovative and resiliant and increase the value of their company beyond competitiors who treat employees less well.
Even if you have small business and do not sell stock … do not you want the same results? productive, innovative and resiliant employees who increase your company’s value beyond your competitors?
Seems straight forward to me