I don't care what you haul, nothing that fits in a trailer is close to as heavy as cattle.
We tow HEAVY, REAL HEAVY, loads that most not familiar with the trade would claim were ridiculous.
I am not saying that there aren't automatics out there that can't launch the loads we haul, in the type of situations where we often get into; but, a few have tried and usually end up having to unload the livestock and head back home with a long face.
The next time they are seen out in public, they have traded to a manual.
One of my main gripes with an automatic is the "lunging" way that they take off, sort of an all-or-nothing plunge.
With any truck that is a manual, big semi or little bitty Toyota, I can move a loaded trailer, forward or backward, CONTROLLABLY, as little as a quarter of an inch.
I can't get an empty automatic truck, even without a trailer, to move, controllably, less than a foot or more at a time, without standing on the brake pedal and playing with the throttle.
When I back against a chute, with a manual truck, I can ease back there and "kiss" it, ever so gently, without so much as a quiver.
It may just be me, but when I try the same with an automatic, I either end up stopping too far away, and then KERBANG against the dock, knocking loose marker lights and causing the big overhead light to shatter and fall to the ground.
To repeat something someone else on here once said, "automatics are for soccer-moms".