Easy to find out by coming up with a business plan, and then pitch it to investors. If you are right, then you'll be the next Reed Hastings. If not, you'll just be another person with an idea nobody else believes is worth investing
Also I don’t think suggesting a giant task like starting a business is anything but a bad faith rhetorical tactic. I’m not going to pitch a DVD mailing company to investors for reasons that have nothing to do with whether or not it is viable (I’m a programmer, not a businessman, and I don’t care to run a business, for one thing).
But anyway if you meant “you” as just a hypothetical person, we’ve already got one, Reed Hastings.
it's like we just want to argue and not actually have a conversation
You are kind moving the goal posts with your first statement "If that was profitable, the service you describe would not have shuttered." and this one.
Saying that a company is profitable but not worth the investment is not going to solve the streaming is our only option. We are looking for a solution other than streaming that is still legal so that people do not have to resort to pirating. If you are suggesting that a service providing shiny round discs through the mail or any other brick&mortar Blockbuster or mom&pop video rental solution is going to be profitable to the point of sustaining a business, then there's a bit of realism that needs to be brought back into the conversation. This seems to not be wanted and instead point back to me not understanding what words mean.