Yes, I heard them from my boss, you may say, however, reflect on yourself before you blame your boss. Your subordinates may also hear them from you frequently. In an inefficient organization, everybody tends to throw wet blankets everywhere. You could also add more wet blankets from your own vocabulary, the list could be endless. That's what really happens in organizational life.
Bosses discourage subordinates and the subordinates become skeptical.
They quit making proposals, suggestions and improvement and the organization becomes very stagnant. Sometime, the bosses are aware of the stagnation and buy a new machine, change the layouts, or even hire a bunch of consultants to make a breakthrough. They do that because it's their function to make breakthroughs. They change everything and rock the organization. However, they don't change and still criticize their subordinate, tossing wet blankets to the people.