you can make the math look okay as long as you ignore the $200-500M per quarter in losses that google swallowed for the 2.5 years that they owned motorola.
There's a limited supply, and only some of them are ever for sale.
He doesn't run google.
You can look at the HTC deal as the learnings from the Moto deal: Buy only what you need, spend no time, money, or attention on things you will need to get rid of.