As someone who does this because it's a decent paying job, I don't think this comment is fair. I think I'm quite skilled, and I've been told so consistently. I don't have passion; I have discipline and professionalism. I take my job seriously. It pays well, and I make sure that I deserve that paycheck.
Passion for me is a nasty world, in the mouth of bosses. It's almost always a way to ask people to work unhealthy hours, and it results in bad work being done, which I have to fix later. If people talk live their own passion, it's fine, but whenever I hear someone appeal to the passion of someone else, it's to sell them into doing something that's not in their best interest.
But do you think you wouldn't be more skilled if you had passion for it? Sounds implausible to me.
I find it hard to believe that your discipline and professionalism doesn't come from, or go hand in hand with passion. Or maybe you are passionate about being disciplined on itself?