Security & privacy are tough selling points; fewer people care about either than you may think, and the existing platforms provide a lot more than most who do care are willing to admit. Also the “too many tools” pitch sounds like an unhinged rant. There’s almost certainly a better way to phrase that, because otherwise the idea that the mere existence of a wide variety of tools bothers you doesn’t stand up to the “so…
On your first point: I think the trend is more will start to care. I agree many platforms provide a lot of security features, but few allow you to encrypt with custom keys though. On your second point: That's a good point, bad phrasing on my part. Thanks for the feedback.
This is just part of the difficulty of marketing; you can't please everyone. You have to figure out what problems the bulk of your possible user market are trying to solve that your app solves, and present that plainly and concisely. Flowery language tends to obfuscate; just plain simple "If you have problems XYZ, this will solve those", then link to greater detail about how each of X, Y, and Z, are solved.
It's hard to do this because we are so used to seeing mid level manager bullshit PR speak on every product page we look at; it seems like a requirement. I've had very refreshing experiences with product descriptions written by a technical writer who just did not give a fuck. Just wrote it up like he was sending an email about a bug report, published it, and it was fantastic.