Keep in mind Jason is very much talking about a VC-funded SaaS company rather than a bootstrapped SaaS company. A boostrapped company may take quite a lot longer than 24 months to hit $1M and no harm no foul. Many of the famous bootstraps took 24 mos to be big enough for 3 founders to quit their day jobs.
The difference is the $1M VC funded SaaS company will have been wildly unprofitable while the bootstrap will have been profitable every step. The VC world rightly regards SaaS as a landgrab and some of Jason's other posts approach it that way. Hence the companies are run unprofitably so they can be grown faster.
My impression from his posts is he doesn't have a lot of experience with the bootstrap world or doesn't think much of it. I frequently write counterpoints to his posts on my Smoothspan blog.