I feel it's no more of a curse than an OS drawing GUI widgets for me so I don't have to. If I really need to customize things I can, but for now I have a fully working application without lots of fiddling.

After all, could you not consider a web browser a tool for the lazy web developer who doesn't want to learn how to make slick cross platform native applications?

I think your mention of OS drawn widgets brings up an interesting point of discussion.

In desktop environments for the most part windows apps look like windows apps and osx apps look like osx apps. A consistant look and feel across applications on a platform gives users a familiar and comfortable experience. This has been a detriment of java desktop apps for years as they appear 'foreign' to the end user.

Is there perhaps an argument that the web as a platform is missing out on this benefit of consistency?

What you might not get is that people used to be as lazy but without the framework. So, you'd get really ugly websites without any good design touch. Bootstrap gives these people a way to have something that doesn't look like shit; still letting more design oriented people to improve and making it stand out.

BUT, I'd say that people seems to only use the SAME bootstrap page; I.e. it's a big framework with lots of useful snippets.. it's sad that we only see the black top bar thingy everywhere.