This is BS. I do this daily, and it has nothing to do with validation.
I don't post it online but I do send a snap. Its a system that a friend and I have in place, it keeps up accountable to go get some sort of workout in every morning.
I can see someone doing this and posting it online to keep themselves accountable.
It's a marketing thing, like a lot of social media content. He's just trying to build a personal brand to promote his consulting business and clothing line. Nothing wrong with that.
I would consider why someone is doing something. Try to put yourself in their shoes.
Would you post what time you worked out everyday? Would you post how many hours you worked today? Would you post how many calories you ate today? There is a reason why this isn't a common way for people to use the internet.
I can see someone doing this and posting it online to keep themselves accountable.