[madair]

He didn't say it's not worthwhile, on the contrary, Marco laments the loss to programmers and tech writing. What he said is that for him it's not worth the risk of putting himself out there:

Some people claim that they don’t care and that they can ignore it. I don’t know if Joel can. I can’t, which is one of the reasons why I rarely write about programming: it’s just not worth the risk of putting myself out there on that subject because the risk of strongly negative feedback is higher than with most other content that I can produce. It’s much easier to share my breakfast than my easily argued, easily disproven, intellectually vulnerable thoughts on programming.

[kscaldef]

It's rather ironic that the submitter went and changed the title, isn't it?