Heavy regulations are the reason why we have the John Deere semi monopoly. The regulatory entry cost is in the millions for any new player to enter the market so no one wants to compete and provide better service.
Every regulation looks good or at least defensible in abstract, especially when some peddler is trying to sell it and the consequences aren't obvious yet.
This is just not true - their machines are purposely opaque and loaded with DRM. Regulation in this area could potentially make the entire system more efficient and cheaper for everyone at the cost of JD's predatory practices. In addition to owners there are lots of independents who could work on JD equipment, but they are all literally locked out.
It depends on who writes the regulations. Today money writes the regs and people pay the price. Take money out of politics. But all three branches are captured. Anything that resembles returning power to the people is derided as socialism. So the result is power over the people.
Given how each tractor manufacturer is essentially associated with its own specific country, I'd say this industry is a great example of how mature industries tend to consolidate into monopolies while getting propped up by regulatory capture greased by concerns over natural security. So while the regulatory costs you cite may indeed be onerous, simplistic calls merely for "less regulation" don't bear out.
the cost of starting a company that makes a line of tractors combines and sprayers is probably second only to an aircraft manufacturer in difficulty and complexity
I think China has this all sorted, we should just have a free market without tarrifs. Let the market provide us the best, un-enshittified products we can find. I am old enough to remember when that was a conservative position.
The conservative position is always whatever benefits conservatives at this moment. Back when they supported a free market, a freer market benefitted them. When market regulations benefitted them, they supported a more regulated market.
I call bullshit until you cite evidence. Farm equipment doesn't even need to comply with road vehicle requirements. What special regulations does a farm equipment manufacturer need to comply with that don't apply to any other industrial manufacturer?