When I joined my current company, I worked on a system that was created with this very same philosophy in mind. I saw the end result of this endeavor, and to summarize this, what you are doing is essentially recreating ASP 3.0 in ASP.NET.

When you render controls in the way you've outlined above, you are not creating anything scalable or flexible. On the contrary, changes that the system may require later will require considerably more work and more time by the developer. This is counterproductive and goes against good architectural design. It has also, in fact, rendered the .NET framework useless for your purposes, as you can go right on and do this in PHP or ASP 3.0