My project is based on reading tons of blog posts within a particular space (responsive web design) and triangulating on reoccurring themes/problems which seeme

My project is based on reading tons of blog posts within a particular space (responsive web design) and triangulating on reoccurring themes/problems which seemed to crop up across them (i.e. a common and universal problem). However, I often wonder if people aren't underestimating the effects of good marketing and sales on the outcome of ideas rather than just the market fit. Granted, a product with great market fit will better sell itself than one without excellent market fit. I often think ideas that should have succeeded and didn't, failed because of poor marketing and sales process, not because of the idea or its implementation. I think we all know of products which keep selling despite there being better alternatives.