Lucas Garron's comments on Github proposing this rule sometimes go to nakedly inconsiderate.
I'm not sure which comments you are referring to; by my understanding, Sarah Strong was the first person to specifically bring up the fangshi. But regardless, the comments of the WRC are generally based on discussions with the delegates; for the most part they are simply a public voice for other discussions that have gone on in private. (Mostly I'm saying it is unfair to single out any one person, so don't go blaming Lucas for this).
As a delegate you surely do not freak out and get suspicious when you see a two-tone Fangshi.
Actually, there has been dispute amongst delegates about the fangshi (I should point out this cube is just one obvious case amongst others). And as a delegate, the first thing we do when we see something out of the ordinary is "freak out and get suspicious". You clearly have no idea what it's like for a delegate, constantly dealing with weird cubes and things throughout competitions.
But now you're going to have to enforce and explain this bad rule. Again and again. It doesn't stop weird cube mods it just specifies the colorations allowed.
Enforcing this "bad" rule will be considerably easier than enforcing the previous rule, so that's a good thing. Explaining rules to people is another thing delegates have to spend a lot of time doing every competition, so that won't be anything new. And while it won't stop people doing other weird modifications to their cubes, it will prevent us having to deal with instances of mixed-colour-plastics from now on, making our lives easier. You don't appear to have been around for all that long, so you wouldn't be aware of some of the history around here... once upon a time "hybrid" cubes were all the rage, and for delegates they caused all sorts of difficulties, and many inconsistent decisions from different delegates around the world. This is what we're trying to prevent in an attempt to improve the situation within the WCA in general.
If you want respect don't assume someone questioning the rules does does so out of "butthurt".
I don't care about your respect, but I still haven't seen an actual reason from you other than "but but but it's my best cube and I wanna use it

". If you actually have a good reason, you're doing an extremely good job of making it out as if you don't have one.
I've tried to give you some insight into the world of making the WCA work; perhaps you should take the time to think about it and consider what I've said this time. What we do isn't easy, stop being so unnecessarily difficult.