This is a problem, and I've long mused over possible solutions. Every time I think about it, I come to the conclusion that the solution isn't a new approach to software engineering, a new language that blows away every paradigm, some abstraction that promises to make app development simple, or any other silver bullet.
Indeed, the only "solution" I see is a solution in just the loosest sense. Namely: We continue incrementally improving languages, frameworks, libraries, and coding practices--a process that has been going on since software began. That's a disappointing answer, but I think it's the only answer, and I'll explain why.
The complexity of the tools we use is a result of their great flexibility and power. For example, a Ruby on Rails app is a huge agglomeration of technology, including HTML, JavaScript, jQuery, CSS, SCSS, Ruby, the Rails framework, and usually a number of other, project-specific technologies. All of these technologies must be learned (no small task), and their quirky interactions with each other must be managed. One sometimes thinks, "There must be a better way! There must be some abstraction that can hide all this technology." But I challenge anyone to design such a thing.
Each of those technologies is mature. Each one has had tremendous effort put into designing the simplest possible API without sacrificing power and flexibility. Even technologies with a lot of baggage, like HTML, CSS, and JavaScript, have seen substantial improvements in recent years. Given that, does anyone think they can do better? Can anyone do everything these technologies do and present a radically simplified API? Remember, you can't sacrifice power and flexibility and just support the most common use cases. Almost any application will need at least one thing that's unique or idiosyncratic.
This is why people use Rails (or similar tools) for custom apps instead of Wordpress. Wordpress has many off-the-shelf plugins that provide commonly-needed features. From a site maintainer's perspective, Wordpress abstracts away most of the complex web programming inherent in those features. But for serious app developers, that's almost never good enough. The plugins never seem to work exactly as you need them to, and they rarely talk to each other the way you would like. A short ways into the project, you're forced to either hack up your plugins, which is a maintenance disaster, or code your own plugins, which means you're really just using Wordpress as an inferior Rails substitute.
