I could be wrong, but what I think is weird in society is that it's wrong for people to love themselves and think they look good? I am very happy in my body, that's why I take photos. If I decide to post them, that's my business. This is the way I look. And yes my body has changed due to exercise I have never and won't deny that. Has my goal been to change my body? No it hasn't. If that was my goal I would be working out in a complete different way. But I like my body the way it is and I want to feel and be strong, but also to run fast and be flexible. Those are my goals. But I'm not going to deny the fact that when I notice progress, whether it's strength, speed, endurance or a physical change... its nice to notice it. To see myself progress.
But the reason - what I think anyway - why people have a problem with me posting pictures is because of my past. You might think I shouldn't look the way I do or I shouldn't post pictures of myself because that is too egoistic. Too focused on my body. But you know what... I post pictures of myself because I think I look good. And what is so wrong with that? If my pictures trigger someone, then it's not my problem or fault. Then you need to work with your triggers. Work with loving yourself and not comparing yourself to others. Because there will ALWAYS be someone skinnier or bigger than you. If you are the skinniest person then you are in a grave or almost there anyway.
So instead of hating on others because they have the confidence to smile in a photo and show off their body. It's a person's choice to post pictures, and whether they want to take pictures of them selves in just pants and post it or of themselves in a bikini... that's their business. If the person trigger you, either work on your trigger or stop following them.