Earlier quoted context omitted.
The comparison would be IMO more accurate if there were only 2 employers in the world.
That still doesn't change the underlying mechanics of the analogy though. It doesn't matter how many employers there are, if the worst case scenario is that you end up where you are now (jobless / no app) The analogy would be more accurate if you could end up in a worse off position by taking the job / making the app, say through lost development time with no payoff
The risk of your app being banned when there is only 2 marketplaces is way way higher than the risk of being laid off when there are many more companies.
IMO OPs argument breaks when they equate a bit of risk to a lot of risk, as if any risk amount were the same as any other.