You could be right there..
It's also possible that you're dealing with a long length, high torque item that has very tenuous connections to a supporting structure, and add onto that it's likely remove-able.
So an engineer has a couple of choices to make:
Precision machining and mounting of a high physical abuse item and hope it stays precise for a couple of years until it gets out of warranty then leave the owner on their own to get a machine shop to fix it.
or
Make a mount that if it gets out of whack it can easily be adjusted by loosening a few bolts and retightening them. The owner can do this right there on the farm and it costs them an hour every few years or so.
I'm not defending the choice. You're correct, the first option would be more expensive and be dead on accurate... for a while. Then it would need repair to get back into spec.
The second choice is what they chose to do with to keep that price point down and be user serviceable without any special tools. If that's being cheap, I'll buy there's an argument for it. However, it's an understandable choice. The other way would cost you $500 more at sales time and it would take you 10 years to get it back in time spent then lose it all again when the parts wear. It's just a choice.
I have an old loader that is made EXACTLY the way you are saying. It has no adjustments, it's held solidly in place and it does not move. It has worn over time and now it's sloppy as heck and I *WISH* I could fix it's level by just loosening some bolts and cranking back down on them. I have to put about $1000 of work into fixing the damage running it 'loose' has caused.