I wouldn’t necessarily agree with that. If you are outraged by something, I think it’s unrealistic to expect other people to explain to you why there is nothing to be outraged about. Otherwise you might as well just walk through life outraged by anything.
Rather, it is your responsibility to take a deep breath and ask yourself, what is it really you are concerned about? And if you deem that serious enough, convince others.
The explainer explicitly mentions that the proposal allows browser to ignore WEI and the web is intended to work without. It even points out that there will be a continuous group of chrome users of ~5% that have the feature disabled.
If website owners rely on this feature, they are hurting chrome users just as much as other browsers.