Why are we not allowed to take pictures as customers but person trainers can take their personal customers?

Theres a rule that says we not supposed to take pictures at Virgin Active Glen Acres, I wouldn't have a problem if this rule applies to everyone, I was so annoyed today when this guy telling me that m not not allowed to take pictures, I always see personal trainers take pictures of their ppl their training, people take pictures and tag virgin active on social medias. The reason why we take pictures is to motivate ourselves and have before and after pictures of our results, this is really so annoying especially if it does not apply to everyone at the gym. I am not really happy about this type of a service.