To start 30% of tumblr users don’t own their own car, which already eliminates quite a lot of potential truck havingness you see.
Then among the car havers, the most common kind is a 20 year old sedan that was purchased for $2,400 and will be driven until the rims weather into sediment and become a new kind of sedan sedimentary rock called a sedanimentary rock. The second most common kind of car is a Subaru purchased by two lesbians who are no longer in a relationship but remain good enough friends still to be effective car co-parents.
Now this does leave an amount of truck havers. About 0.5-1% according to science. But importantly when you ask them about the truck the answer is “yeah my job is to pull stuck bulls out of the mud on the farm” and then they pull away and you get to see all the muddy bulls in the back of their truck, which is a real treat.