The early and enthusiastic support of DHH / the Rails community had a lot to do with the initial success of TextMate. Whether this was 'deserved' is too subjective to be worth debating. It happened, and TextMate took off as a result.
I'm not claiming that TextMate was the best choice, just that it's unfair to call it a bad choice or sub-par. It was a very solid, decent text editor.
Textmate is about bringing unix and scripting power to people who don't have time to learn an esoteric system
imo the real problem is laziness