Have you ever thought what it takes to make a product? If your product is electronic, you need to have circuit boards and housings made. Then all of your components to be added to the circuit boards need to be sourced and soldered into place by machines. No hobbyist prototype hand soldering is going to be done with a retail product. I needed extruded aluminum offsets to hold a circuit board away from its plastic case. I had to submit a CAD file to have sample parts made, and then wait to see if they met my specs.
It takes time to make the simplest electronic gadget good enough for retail sale. Then there is the packaging. It takes a team of specialists, including graphic artists, to make your package appealing. Then you need to source a company to make the boxes or packages, and you might have to source another company to make any plastic inserts or foam packaging materials. You can have dozens of separate companies involved with making your product. I had an idea for a product, but I did not have the expertise for the packaging and marketing. I knew how to draw up the specs for the extruded aluminum parts I needed inside the case, and I made a CAD file for the plastic case and its button covers.
I never even considered that I would have to have the cases printed with information to give that professional touch. The prototypes I made that were in use by family and friends were all done by hand and had no fancy case or packaging. Well, that is not how the retail world works, and I found that out rather quickly. It takes time and money to get an electronic product to market. I had to wait a long time for the UL and CSA listings for product safety. Still, in the end, it was worth it.