[Why be you], when you can be new?

Ratchet: Upgrades, people, Upgrades. That's how we make the dough. Now if we're telling robots no matter what they're made of, they're 'fine', how can we expect them to feel crummy enough about themselves to buy our upgrades and make themselves look better? therefore, I've come up with a new slogan. 'Why be you, when you can be new?'
[From the movie "Robots"]
I'd like to know if "Why be you" implies "Why should you be you"
Thank you in advance for your help.