I'm not sure I understand this line of reasoning. Crapware/Malware exists even in locked down store monopolies, therefore we need to open up the platform even more? What do you want, alternative app stores? The ability to sideload apps? Android has all that, it's still an awful platform to develop for.
Let's say this guy could go the alternative route and publish elsewhere. He'd still have a problem because most of the traffic goes through the Appstore, not some other venue.
Good is the enemy of great.