1) Clicking a button that says download is too hard? I'm confused by the mythical people who want encryption but are too dumb to follow a software installation paradigm that's been around for probably longer than they've been alive. Fine, search the appstore for an [proprietary] app: http://imgur.com/a/WbuZA . How exactly does this address your original issue of wanting OSS that's verifiable?
2) I could but I would go broke in minutes. 99/100 people would reach into their pockets or purses and pull out a ring full of keys and would intuitively understand that their computer uses an application to do similar. If your faith in people is so low you think they're all morons, why bother encrypting what they have to say. They're idiots anyways, not like they have enough mental capacity to plan anything according to you.
3) By default it uses either pgp.net or MIT's hkp servers, I can't recall. Most public keyservers sync their directories multiple times a day. You can search by name or email: http://imgur.com/a/SSHlP
4) How does using gmail prevent you from using the built in Mail.app or have anything to do with the headers not including gmail stuff? OSX provides a system-wide onboarding process for linking your gmail to all the system apps...
5) So you can send user generated input that doesn't match what they wanted to send. How is that helpful?
I started reading your comment, but you're attacking a straw man: nobody has ever said clicking a button was hard.
Additionally you think people who don't understand software that's complex to find or install are 'dumb'.
I stopped reading there. You should reconsider how you think about others.
Edit: you've edited your post and added some screenshots of the app store. Fine, I'll bite. There are good things in the App Store, this doesn't address the fact that the GPG site won't point you to any of them at all, that GPGTools has multiple names and the download link is off the front page, that MIT is not a mainstream directory of people, that knowing about keychains being a popular requirement for crypto does not means that it is necessary, or any of the other massive flaws in crypto UX as exists today that I haven't already addressed.
You said "Everyone and their mother understand that keychains hold keys." then agreed this wasn't true, and then twisted that so claim that I think people are morons. If you're not trolling (if you are, you're doing very well playing someone who has no sense of sympathy), you're missing the point: other people don't care about crypto, they just want privacy. Much in the same way you don't care about rack and pinion steering, you just want to go somewhere. That doesn't make them morons, it makes them busy.
2) I could but I would go broke in minutes. 99/100 people would reach into their pockets or purses and pull out a ring full of keys and would intuitively understand that their computer uses an application to do similar. If your faith in people is so low you think they're all morons, why bother encrypting what they have to say. They're idiots anyways, not like they have enough mental capacity to plan anything according to you.
3) By default it uses either pgp.net or MIT's hkp servers, I can't recall. Most public keyservers sync their directories multiple times a day. You can search by name or email: http://imgur.com/a/SSHlP
4) How does using gmail prevent you from using the built in Mail.app or have anything to do with the headers not including gmail stuff? OSX provides a system-wide onboarding process for linking your gmail to all the system apps...
5) So you can send user generated input that doesn't match what they wanted to send. How is that helpful?