There could still be a circuit in the light that could pass the current without lighting up. Or even if there was no such thing, it could be added in the future after everyone was shamed into believing you are a fool for putting tape over your camera.
There are probably other ways. Stop trying to shame people just because you haven't thought of a way to bypass this.
Neither of those things is the case. You can’t power the camera circuit without passing through the low power light. We can rely on the diligent work of security researchers to attempt bypasses and do teardowns for us, so the risk of Apple compromising an older model only exists for people who buy immediately on release.
The support document also suggests a paper-thin cover, so it’s not attempting to shame anyone.
There are probably other ways. Stop trying to shame people just because you haven't thought of a way to bypass this.