Not only is the UX more complex to get the job done, stuff like what we're doing (ex: personal->work calendar sync) is more complex than you think and simple "if this then that" types of workflows start to break down.
We have nothing against Zapier (heck I'm a user for some stuff). But there are definitely things it is ill-suited for, despite having an amazing marketing engine that can capture a very long tail of search terms due to the NxM nature of their product.
"Fun" fact: one of our users recently found us after screwing up his calendar sync Zap and, on a random Sunday morning, ended up inviting thousands of his coworkers to dozens of duplicate meetings, all from his personal Gmail account. It was his fault (his Zap had several errors in it), but in the end he was much better served by a dedicated solution.
I think the author's advice is spot on: there are opportunities in making better solutions for popular Zaps. Just please don't do anything in the calendar space ;)