Why don't we agree that the exception to the rule that is that it's possible to go it alone and be successful? I can't think of many rational reasons why one would choose to go it alone.
You need at least 2 founders to build a successful startup.
Don't try to deceive yourself into believing one person is all it takes. Once your startup get traction, you'll get burnt out if you are doing it all alone
I think you can infer it. There are studies on people who have to work for long periods in isolated environments (and high stress), to those in isolation that aren't working.
When it comes down to it, we don't do well alone.
If you want to have word play and add additions like.. I'm alone and a startup, but I have a fantastic group of individuals I surround myself with...or I have a family that really cares. That's not really alone is it?
I don't see many isolated entrepreneurs that stay alone and never give up the control--and grow. How would you hire and instill passion? How would you not have a motley crew of cog creators?
Having a partner, or general support, is the groundwork for a network. A network is what allows us all to play, create, and grow.
Let's just agree that every case is different. There's no ONE right answer here.