I understand the reasoning but the need for capital depends on your situation. For example if you want to start a software business and are a good developer you need no capital. The only thing you need is time to work on your venture. It might look like it's the same because taking time to work on your venture requires to have money but there's a big difference.
The author could work on getting his/her point across. I mean if I need something and see something that addresses that need, why would I not then want it? Any help would be appreciated.
I see your point, but this can happen both if you created a want-based venture or a need-based venture - and marketed the product correctly in the later case.
Perhaps this is out of the scope of the article as it doesn't concern itself with presenting marketing techniques but focuses on contrasting Lean Startup with another model, and outlining the underlying need to differentiate need from want ventures
As a skilled developer I can trade time for capital, but time is the most valuable thing any of us have, so I have to be very careful about taking on commitments that will use up a lot of my time.
You might want to read this :
http://read.reddy.today/read/4/flexible-revenue-model-vs-mvp...
Good luck