yes, because google coerced them with licensure rules. which is backed up by both the USA and CN government force.
Discussion
Yes and no. I don't think Sony ever made the decision of making all their devices hackable, yet it happened. In the end the move towards, on-line stores and gaming killed pirating your PS.
It's true that with phones is harder to make OS compatible with all devices, but that just ends up meaning people who don't want a stock OS move fewer devices, instead of get what you want and hack it.