A link is not a bad link for going to the source. You’ve misunderstood the post and also failed to identify a logical fallacy (even had your understanding been correct).
Whether the link goes to the source or not is irrelevant. I’m calling it a bad link if it goes to a place that’s either enshitified and/or where the content is unreachable (source or not). This is more elaborate than what you’re used to. There’s more than a dozen variables that can make a link bad. Sometimes the mirror is worse than the source (e.g. archive*ph, which is a Cloudflared mirror site).