Do leather suites need conditioning?

Just bought a new leather suite (around €2000 for a 3+2). The salesman convinced us it was good quality leather and should wear well.

Our old suite was 14 years old and the leather still looked very good, while a cheap small sofa we bought for another room had worn really badly, despite being half the age. When we mentioned this to the salesman, he explained that different qualities of leather will wear better or worse.

And he then tried to sell us an aftermarket cleaner and conditioner like this:
FurnitureClinic Leather Care Kit

Was that just to ease our minds? Or make a few extra euros off us?
Is such conditioning really needed?

We didn't do anything with our old one, and it never dried, cracked or peeled.