So why were you "begging the question" by declaring that the MacBook Pros would be useless in 1 to 2 years because their batteries would be dead and not replaceable. The fact is that you are stating as facts, things you admit you DON'T KNOW.
The facts I am stating are not even a question of IF but a question of WHEN the batteries fail, that the user will have to take their Macbook to an Apple Store. If that weren’t bad enough, you have to leave it there unattended with some Apple lackey in a black turtleneck doing God knows what sifting through your data unbeknownst to anyone.