At the other extreme, you have someone like Dean Lister said: "The more you tap, we learn more." If you do not know who is Dean Lister, he was the winner of absolute division of ADCC 2003 on the harshest and most famous presentation of the tournament in the world. It is also an Assistant Coach of The Ultimate Fighter TV show, and fought in the UFC himself.
You can see that I agree with "The more you tap, you'll learn more." I agree at least two reasons.
First, if you hurt, can not be exercise for short or long time. So if something is violent and you do not know what is going on, tap only on the life and the fight against another day. Eventually, you'll develop a better capacity to assess, as a dangerous situation, but at an early stage of the game, it is better to watch on the caution.
Each experienced grappler that can be on your narrative about how he got the injury because it has been hard head and did not tap earlier. They said that is smart thinking by learning from your mistakes, and wise is to learn from the mistakes of others. If discuss about "Tap Out", do not think smart - but better to think wisely!
The second, with preparing to surrender / tap out, you will explore more of the various positions and submissions. This exploration will increase the list of libraries from the mental preparedness of grappling, and you will become a better grappler.
So if you just start, do not be afraid to tap and tap early more often.