They want a standard but good USB connector for the laptop and a proprietary port they control for the phone.
That's why they gave USB-C away for nothing.
It's the same reason they gave away the mini-displayport connector for free too - they want it to be a standard.
The phone port though, they want to control because they want to control the peripheral market for the iPhone and iPad. The peripheral market for computers they don't care about, but they would rather that the connector of choice be a good one.