Boxed up in such slick, sleek packages!
Once upon a time, the most popular celebrities were boxed up in such slick, sleek packages, it was almost impossible to get a feel for their real personalities.

What does " boxed up in such slick, sleek packages" mean here? Could you please simplify it?

Thanks a lot in advance

Question

Boxed up in such slick, sleek packages!
Once upon a time, the most popular celebrities were boxed up in such slick, sleek packages, it was almost impossible to get a feel for their real personalities.

What does " boxed up in such slick, sleek packages" mean here? Could you please simplify it?

Thanks a lot in advance

Answer

it means that their public persona was closely monitored and their private lives were kept hidden behind the glamor.  In the past it was easier to control a celebrities public persona due to no social media and cell phone cameras.