I don't know about a 94%/6% breakdown, but I know that if truck drivers are paid as described, by-the-mile, the workforce must skew heavily male, since pay will be higher for physically stronger individuals. It is not that women are not physically strong enough - it is that stronger people are paid more for doing this job, and therefore the people most incentivized to pick truck driving will be those who are strongest, and the upper echelons of that measure are exclusively male. Not the entire top 3.5 million that it would take to fill every truck driver job in the US, and of course some strong people will choose to do other things, and some less-physically-gifted individuals of both sexes will choose to do it despite not being compensated as well as others with the same job.
So. If 94/6 doesn't seem reasonable to you, what does?
When some people have no reasonable argument left to make, their last ditch effort is to shame the person they are arguing with for the opinions they hold.
Outside the just world of your delusions, where everyone is kind and good except the evil white males leeching off the world by the right of their "privilege", there are people that would kill you and take your property in a heartbeat. Truck drivers are trusted with transporting and protecting substantial sums of property with every trip they take. I would absolutely trust a big strong man to transport my cargo over any woman, for the same reason that I would not trust a young boy to do so. Thieves (who are mostly strong men themselves) aren't scared of women or boys.