Seriously there is enough space to make it just 0.1mm thicker
Apple know better than random people on hacker news about what makes their phones sell, they don’t make them thinner for no reason.
So are you proposing that you simply tell companies to use "good design principles and sane decisions" and leave it at that? It's up to their interpretation? How does that get us something different from what we have today, and how could you say they didn't follow that regulation then? "We did use good and sane design principles that are repairable."
If you can't say what rules (words and details) govern what you want to happen, how can you pass a law that gets people to do what you want?
https://www.ifixit.com/Store/Tools/P2-Pentalobe-Screwdriver-...
Also - it might be nice if Apple allowed competitors to manufacture pentalobe screwdrivers themselves.
And maybe check Amazon before saying Apple is preventing third party screwdrivers. There are hundreds there.
Do I think that Apple shouldn't use some proprietary thermal paste to mount their heatsinks? I don't really care and I don't think anyone here does either - but the tools to get general access to the device body are a different matter... they're necessary for a wide range of relatively simple repair operations.
Who is to make the call about what specialized equipment and level of expense is ok enough by you? If people are buying the phones for the features they offer and the way they're constructed, and they offer a repair path, what do you suggest we do now, to satisfy your criteria?