Entrepreneurship

I found the article very interesting, but I don't agree with a couple of points made. I don't agree that an entrepreneur stays focused on one road. I don't think that an entrepreneur is going to ignore an awesome business oppurtunity because he focused on his business plan alone. In fact my previous boss was an entrepreneur and he always had other irons on the fire. Another point where I disagree, is defining someone who is looking for "valuation" as not being an entreprenuer. There are several successful entreprenuers who are interested in buying and selling companies. Isn't the buying and selling of businesses a business itself?