I too felt alone in the wilderness and couldn’t understand a way to turn this fascinating stuff into a product I could sell. The ‘particle community’ and time have shown me some light forward. I’ve focused on creating specific use case designs that people care about - can you imagine, most people don’t care about data…?
The ‘products’ I am working on do often exist already and are available but expensive. Hobo Data Loggers do a fantastic job - but I want to create a bit more so I’m building it myself.
But I think your comment is common and spot on - we have great tools available with Particle.io (or any microcontroller really) but there is a gulf between idea and product. I wish there was a Particle Store - not just a web site to buy the devices - a place to share products made by these devices. And to have a kind of go fund me for designs. This is a hallmark of the 3D printer world where designs are shared and sold as a way to sell printers (prusaprinters.org or thingiverse.com).
At any rate if I can help - not that I’m an expert - please ask. You are not as alone as you think you are!