Glad I misread you, awesome you could return the favor ;) - we're going for the misinterpretation championships here.
I'm not suggesting it's detrimental for a woman to be in a relationship. I'm suggesting it's easier to go ahead, follow your dreams, and take crazy risks when you're not in a relationship, independent of gender. Simply because less obligations mean failure is less of an issue.
Note: This is about _starting_ as an entrepreneur, not being one. Obviously, there are many who make both their business and their relationship work just fine. (And I have no doubt many manage to start a business while in a relationship, too. It's just a little bit scarier/harder)
Ultimately, as long as both you and your partner are good with it, do whatever works for you :)