This is the correct response, and avoids participation-trophy culture results when "building". Accept criticism as a way for you to think outside your comfort zone.
Agree. Some people let their own pride blind them from seeing the opportunity that comes from others directing negative emotions at their work. It's not about whether the emotion is positive, it's about the intensity in either direction. Frustration is as important as love. Ignoring that, or to ignore the people giving it is a mistake. Responding by silo-ing is the same energy that pushed Twitter into being under the control of the feds.