On your first point, I think he's suggesting something like "a lazy programmer will right great, detailed unit tests because he's too lazy do all the work by hand and not excited about fixing obscure bugs down the road." Seems a bit odd to call that lazy, but I get the gist.

On your second point, I guess I would say that "curious" might be an odd word. Some people who are intellectually curious dive into things very thoroughly, so they are likely to be meticulous but also likely to quickly find something else to obsess over.