Can you build one? Can you even source a Broadcom SoC? While Arduino-compatible MCUs can be trivially dropped into your own PCB designs. Some can even run dead-bugged with little to no effort, due to a much higher degree of integration.
Congratulations on being a person of the sort I mentioned, who managed to get a few of them. If I build one into a product can I buy 100 of them? 1000 of them? Can I source the SoC to make my own board based on the design?