Does startup and Founders require spiritual for success and growth.

Yes. Minimum 5 sets of Pranayam daily else you wont succeed.

These need to pretend spiritual for PR reasons. Behind the camera they can do and actually do any shit. A business is stressful only till it reaches a certain size / till it turn profitable. Beyond that it's basically repetition. So there is either limited or no stress. That's why you will find founders or profitable companies doing podcasts and having an active social life,