Because with her it's all about Instagram. None of it is about Slimming World, losing weight, getting fit, body positivity or whatever other trend she spouts on about to gain more followers.
Deep down she's insecure and has a serious identity problem. She went to Brit school with people who are now more accomplished than she will ever be and her 20k+ IG following is what defines her worth in her mind. Without them she's nothing.
I don't believe for a second that she'd be up at the crack of dawn for the gym if she wasn't on IG.
Everything she does is for attention, particularly from men. It's really quite sad considering she's 31.