Generally I don't need automounting. When I insert a USB storage device it is usually because I want to format it, partition it or just install an image on it.
On some of my Raspberries I do have devices that need to be mounted, but that is all at boot time, so I do that in other ways.
Occasionally I want to mount a device short term, but don't like all the "random" mountpoint stuff that happens. I prefer to use /dev/sdXn and a matching /mnt/sdXn (in most cases) for my devices. Much of that is done by scripts anyway, so they mount things where I want them to.
There's you problem right there. A new user, perhaps just introduced to Unix, will look at sudo mount /dev/sda1 /mnt and wonder what all that gibberish could be about? What could be easier than plugging in the thumb drive, clicking on the icon that pops up to access the document he needed with just another click?
How to make your arguments stronger? Longer is not the answer.