Assuming everything is as it seems that's an appropriate reaction. However:

“Appear weak when you are strong, and strong when you are weak.”
There is something incredibly important to understand, not just about battles but about life in general: much of what we and other people do is based on perception. It’s not what is, but rather what we think is.

Thus, many battles are really games of deception. Each side tries to trick the other into making a mistake by showing them a different face. It is to your advantage if you can misperceive your opponent to never attack your weak points and to unknowingly run into your strong points.

Sun Tzu says:

“All warfare is based on deception. Hence, when we are able to attack, we must seem unable; when using our forces, we must appear inactive; when we are near, we must make the enemy believe we are far away; when far away, we must make him believe we are near.”

In this way, you foil your opponent's plans. They attempt to strike you at what they think is a weak place (because you’ve misperceived them) but turns out to be one that you can easily defend. Or when you appear strong on the surface they avoid attacking you altogether because they think they’ll lose (but really it’s a weak point that you’re hiding).

Be aware of these surface-level interpretations. Understand how people think and use that to your advantage by presenting a face that is in your favour

https://medium.com/change-your-mind/12-the-art-of-war-quotes-to-become-a-strategy-master-37caca91ec5f