That's sort of a dated rule. I've been here even longer than my account suggests, and the quality has most certainly degraded - both from comments like OP's, and from people defending it under the umbrella of free speech (kind of an absurd stance given every community enforces quality standards.)
PG himself has acknowledged the degrading quality. Thankfully some work has been done to curb this trend, but it does seem somewhat unavoidable as a community grows.
PG himself not only acknowledges that quality has declined but also that he has no idea how to reverse it. I don't know if I can effect change here, but I do know how it is done and I have done it elsewhere. Raising the bar on treating other members with respect and tolerating a diversity of viewpoints is part of how that is done.
You are, of course, free to make fun of me while bemoaning the decline in quality. I am free to think you are clearly clueless if you cannot see a connection between the two things.
PG himself has acknowledged the degrading quality. Thankfully some work has been done to curb this trend, but it does seem somewhat unavoidable as a community grows.