Is the kernel of this advice to start with a known problem which is already solved with a paid service, and then just sell that service more efficiently? That's how I'm interpreting the "skip the R&D phase" idea. In that case I think the question becomes "why is this a better strategy for a startup", since this framing implies going after well-established markets with (at first) an undifferentiated product. Both 'productize' and 'automate' sound like things that incumbents would be able to do more effectively than startups, and likely has already happened in most cases silently in the background.