This blog post benefits a lot from understanding where the author was at that point in their career: They had gained notoriety for their writing about their Bingo Card Creator software, but were moving on. After this they went on to build Appointment Reminder, a webapp that grew to a nice MRR before being sold off. Both were nice little indie developer success stories.
I grew up reading his writings and learned pretty quickly to read them as "this is what I'm thinking right now in my life" even though they're written more as authoritative and decisive writings from an expert. Over time he's gone from SEO expert to $30K/week consulting expert to desktop app expert to indie SaaS expert to recruiting industry expert to working for Strip Atlas. It was fun to read his writings at each point, but after so many changes I realized it was better to read it as a blog of ongoing learnings and opinions, not necessarily as retrospective wisdom shared from years of experience on the topic even if that's what the writing style conveys.
So I agree that the advice in the post should be taken entirely in context of pursuing the specific goals he was pursuing at the time. The less your goals happen to align, the less relevant the advice becomes.