While it will be nice to ship hobbyist apps through a third party channel, it will only be a matter of time until app users are bullied into installing third party stores. For the normal user it's less of a "choice" than it is for the technical user. The average user wants to play games on their phone and will submit to any breaches of privacy in order to do so. These average users are the parents, siblings, and children of most technical users. The average app is spyware even on the App Store and I only see it getting worse with these loosened restrictions.
That said the content on the App Store is already pretty bad privacy-wise, this is more of a money issue and whether Apple deserves to get paid for their role as an app channel.