Why they ask for pictures
Because a CV cannot show a single thing about a job that is half visual.
Start with the line most candidates write: "responsible for cabin presentation and in-flight service." That sentence is on hundreds of CVs, it describes nobody in particular, and it leads nowhere. A recruiter reads it and learns nothing they had not already assumed from the job title.
Now write it properly: "in charge of catering orders and plating meals in flight." Better, and much better, because it names what you actually did rather than the area you were vaguely responsible for.
And it still does not show whether you are any good at it. A recruiter now knows you plated meals. They do not know whether your plating is clean or crowded. They do not know whether your table setting is balanced or whether the glassware sits where it should. They do not know whether a bed you make looks like a hotel or looks like a sofa with a sheet thrown over it.
That is the limit of writing. Those are the things an owner sees on every single flight, and no sentence, however well constructed, can transmit them.
An operator asking for photographs is not being difficult. They are trying to answer a question your CV left open.
