Hi Imaan, your friend thinking is just a thinking and assumption. Companies making these single cab especially American boys like Chevrolet, GMC, Dodge etc think and consider this fact 100 times more due to NHSTA presence in US and their rigid rules for safety.
If you are held up due to this fact to not to buy, then check their safety rating esp rollover ratings and make your mind.
Don't make experiments with oil. Stick to manufacturer recommended grades and service intervals. It can only take one bad fill of oil and you're taking an engine apart to change piston rings and shell bearings.