Yes, amen to this.
As a manager, be honest to your executives and your reports. Given enough people in your team, there is no tactical decision that will make your engineers work faster. Your only real option is to admit early that your deadline is untenable, and replan by reducing features, or extending deadlines. Whipping your engineers to work harder has never worked, and will ruin their trust in you forever.
Source: You cannot survive poor management ↗