What this article misses is that genuine feedback helps us grow, and being open to it is as important as being able to deliver it in a way that doesn't take something away from the recipient. Getting others' input and adapting to it (or learning when to accept but not heed it) is crucial for getting better at whatever endeavor one is engaged in.

If you have a suitable level of trust and respect between you and the person requesting approval or feedback, then your input can be valuable without it being undermining of their ownership of their creation. In fact, the opposite; by soliciting feedback (preferably early, not just at the end of a project), you can help build a sense of ownership from the person giving feedback.