enough for it to get called out by the media

He's wearing the old camo pattern which hasn't be used in decades, which any military veteran would cue in on.

There is no indication of of the date of the photo. The tweet even mentions "looking up to" implying they may be an older role model. That photo could have easily been taken decades ago.

Maybe we just assume digital photo = digital age and everything posted is recent?

You wouldn't have that objection if it was an old black and white grainy photo with the same out of date pattern.

Reminds me of my favorite comedian: "One time, this guy handed me a picture of him, he said 'Here's a picture of me when I was younger.' Every picture is of you when you were younger."

"and the picture of you when you were youngest is also the oldest picture of you"