Now, I don't usually comment on forums, but you've given such a monumentally Apple-biased take that it makes me wonder whether or not you realize the insane degree of mental gymnastics you've performed.
Let's keep things simple.
The main reason why people are in support of right to repair is to prevent Apple from succeeding in the creation of its anti-repair monopoly. Take simple battery replacements, for example—a basic form of maintenance that virtually every portable device will require at some point. Apple wants $89 to replace the battery on my 3 year old iPhone 11 Pro. Not the cheapest, but at least somewhat palatable for folks who aren't struggling in life. Heck, if I can tolerate some warning messages on my phone, I can just go to some local repair shop to have it replaced for $40.
Now, imagine if Apple were to go further than simply displaying warning messages on my phone, and outright disable my device if it detects a non-genuine battery. Oh well, have to get the battery replaced for $89; no big deal I guess. They know their devices best, after all! Alas, all of a sudden, Apple raises the price of battery replacements to $199, stating inflation and volatile market conditions as their reasoning. I don't have any other choice—Apple's the only one that can service the batteries, and as such, they're free to dictate the market price. Just like that, my perfectly functional but now 3-year old iPhone (that sells for $350) isn't worth fixing anymore. Either I deal with the poor battery life, pony up the cash for a new device, or pound sand.
Don't act like this is some crazy dystopian slippery slope that I just came up with to antagonize Apple; it's already happening right in front of you. Memory and storage upgrades for Apple devices cost nearly ten times as much as the current market price, which they're able to get away with because those components are all soldered now. The only reason that the same thing hasn't happened with basic repairs like screen/battery replacements is because of the availability of cheaper and relatively abundant third-party options.
Oh, and don't even get me started on the added supply-chain costs for logistics and warehousing. I can assure you that Apple also spent (and is currently spending) a significant amount of cash on R&D for serializing individual components and building highly specialized one-off machines which have the sole job of reprogramming them, the costs of which have already been passed on to us consumers.
TL;DR: Right to repair prevents Apple from monopolizing the industry and bringing service costs to the moon, while engineering devices to be difficult to fix arguably costs more than just allowing third-party repair.