Vintage I am a firm believer that there is no "one right" way to do things. And of course our personal experiences shape our views too.
My Mum and Mil would say that their DH's are their best friends and they have been happily married for nearly 50 years. My DH and I have been together well over half our lives.
Anyone who know ms the three of us (including our DHs') would fall about laughing at the very idea that our husbands could command us to do anything! 
I'm very independent, so I've made sure that although all our finances are joint that I'm in a position to solely support myself and my children should I need to. My DH is my best friend but he travels a lot for work and I manage quite happily without him. We both have friends and interests of our own.
You are right though, if something unthinkable happened and our marriage fell apart I would be devastated. He is my world and has been for a long time.
But my children would need me to be strong and I am fiercely proud so I have no doubt I'd pick myself up and carry on despite a broken heart, desperately hard as that might be.
It is not in my nature to hold back, in any area of my life. I don't hold back In my sport, I have a reputation as a workaholic and I can't give my DH less than my whole heart any more than I could my children.
I'm an romantic optimist it's true but I'm not impractical. I like to think that my bases are covered.