Here's how I see it, and I'll give you different scenarios!
Me being a young buck with no money and one skill set, I wanted to get into business at the age of 17 (which I did). I was marketing clubs here in Houston and in return I would get a percentage of the bar. How I got into it? I could have easily been an employee to the bar/club owners here... but I positioned myself to where I got equity in his business.
Now, vice versa... Instead of bringing on a bunch of partners, I could simply hire people to do what a potential "partner" brings to the table. The only time I'd ever bring on a partner (in another business) is for financial reasons, but I would still have majority of the equity in the business.
Luis, you are right to an extent. But you wouldn't want to become business partners with anyone that you can hire someone to replace. Point being, if you feel that you could hire someone to do the job of your business partner then you should NEVER make that person your business partner. When you find a
mind that is not replaceable by an employee than that person should become your partner. Typically, those types of minds will not be hired because they have an owners mentality as well. And sometimes its better to join with them than compete against them.
Im not suggesting that everyone should have a business partner by any means. But simply stating that 2 powerful minds can be better than 1 in my opinion and can expedite your growth. There is only so much time in each day to do business. But with 2 owners you can get twice as much done in that day. I definitely would not have grown as fast without my business partner. But I do feel I would have still ended up as successful, just would have taken a little longer. Think about how hard you work for your business. NO ONE works harder than the owner because he cares the most. So if you have 2 owners and both of them are committed and work equally hard. Hypothetically, your company should grow twice as fast.
I believe that my partner is not replaceable with an employee and I am quite certain he feels the exact same way about me.