Why don't VC invest in Intl Logistics Companies

I am always baffled, why don't VC invest in International Logistics companies, which are insanely profitable everywhere. I am not talking about Carriers, instead, the 3rd Party logistics companies like us. They are not only profitable, but they also grow like weed. Everytime I see, a random social app, generating tens of millions, I become sad. Because the social app in question, would barely make any tangible profit in any foreseeable future.

Where as in our industry a medium sized company with $1-$5 Million funding can easily pay back the entire investment in 10-15 years. Which one can further invest to open offices in other countries such as China, I don't even need to mention, how much potential China holds for the freight industry.

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