Honest criticism is free consulting. Some people pay thousands to hear what your friend just told you.

Somebody telling you a hard truth has taken a risk on your behalf. They could have said it looked great and kept the afternoon easy, which is what most people choose. What you are handed is an outside view of your own blind spot, from someone with no reason to flatter you, and that stays rare no matter how it feels arriving.

When it comes, resist explaining. Say thanks, write the point down in their words, and look at it again tomorrow. Then tell them what you changed, so they stay willing to do it again.