Because you are a noob and run very crappy land fat no defense countries. Too tempting. And I think this jus tmeans that unless you have some luck on your side you do not have the capability to make top 10.
2.7M is quite easy to break. I'm carrying a lot more than that right now and on a lot less land than 13k. Dealing with higher costs as a result, but I wouldn't be comfortable with less.