Exactly where we place the limits is up for debate, but I think I conclusively proved to everybody reading this that there need to be limits the only question is where.
I am allowed to remove my headlights, but I'm not allowed to drive on the roads if I have removed my headlights. The restriction is on roads.
I own my home, but I'm not allowed to replace the GFCI outlets in my bathroom with non-GFCI outlets.
Having the right to modify and repair does not mean a carte blanche to ignore and circumvent building and electrical regulations. You do have the right to remove, replace or add additional outlets providing that the regulations are complied with, and you can purchase outlets from any vendor which sells products compliant with the regulations.
Availability of first-party and third-party parts would greatly open up the market for electronic goods of all kinds. So long as they comply with the necessary regulations and perform equivalently to the original parts, it would be a vast improvement upon the current state of affairs.
The issue there is driving at night on public roads. You can, with your own car, remove your headlights. The car manufacturer can't show up and sue you for that.
> I'm not allowed to pour oil on the ground even though it would only destroy my own grass
That's not the only thing it would destroy (ground water, local wildlife, etc). You are allowed to style your hedges in the shape of a middle finger, or pluck all your grass out blade by blade (save for any HOA restrictions you agreed to).
If you own your car, and the headlight burns out, why shouldn't you be allowed to repair it back to the original factory state? Why should you be forced to pay someone else to do this?
If someone tries to argue that you're going to do it wrong, it seems like the onus should be on them to prove that your repair was bad and dangerous.
Being able to repair things is very different, it is _in_ the common interest and likely against the interests of the manufacturers.
Also if we want to prevent fires because of batteries then we should make Apple products illegal because it happened that Apple products had issues too https://support.apple.com/15-inch-macbook-pro-battery-recall
As for bad parts and bad repair jobs, sure. I would think that owners are incentivized to buy parts that are safe and to install them correctly. Of course some battery batches will be bad, but that's true for authentic parts too. Remember the Samsung Note battery issues?
I believe there are technical differences in how ownership of the land works in different jurisdictions throughout the world. The land or the earth below your grass might not be as yours as an article of clothing you're wearing.