Probably because the tsa isn't able/allowed to hand out access willy nilly.

It's kinda like how the police need warrants to request cellphone data, but cellphone companies could sell realtime data to third parties who in turn sold it to the police.

https://news.ycombinator.com/item?id=17081684

It's fine to speculate, but I really wish the article had made it explicit given that the EFF has actual lawyers on staff.