I think this risks becoming a "me-too!" restatement of my earlier post:

not really, what you discuss is the economics, where I discuss the "know-how".

There are products on the market where a brief look at the BOM will make you say "I can make that for half the price". Such products, usually, are 'overpriced' because of the humongeous engineering investment that went into them. I shall not claim that nobody can make an equivalent product without a humongeous engineering investment just hold that to be extremely unlikely, and - worst of all - it usually takes a substanatial engineering investment to find out that a humongeous engineering investment is required.

Erik