I like this. I think you need both. Part of trp could be considered product development and part could be considered marketing. Both are important. Although eventually if you transform your product (you) to be great enough - it will sell itself.
Its also to do with 'delayed gratification'. In general its easier to do things that ere definitely good right now than maybe better later. Working out is effort over being ripped eventually. Approaching is scary over maybe getting laid later. Jordan Peterson wrote about it. Resonates with me.