Regarding someone insisting that getting punched in the stomach is safer than the shoulder

As the title says. Last year, when I was a sophomore, classmates were testing their striking durability. I was curious about what it would feel like to get punched by a friend, but I asked to be hit on the shoulder. At this point, the friend who was about to hit me said, "Getting hit on the shoulder can easily cause injury," as if implying that getting punched in the stomach would be less dangerous. But with so many organs in the stomach, would I believe him if he said it's less likely to get injured? Internal bleeding sometimes isn't even felt. He might have been worried about his fist missing and hitting my face, but that's a different issue. Let me tell you what it feels like to get punched in the stomach. When I was in elementary school, I was quite reckless. I asked a male classmate to punch me in the stomach. I saw him throw a full-power punch. The only sensation I felt was my internal organs contracting, and it even made me want to vomit. I don't regret asking him to throw that punch because it made me realize what it feels like to be hit, and I won't be so reckless to seek out getting hit or think I have strong durability. In conclusion, I think anyone who says getting punched in the stomach is less likely to cause injury than getting punched in the shoulder is a true genius.