Stereotyes, stereotypes, stereotypes. If someone recommends using a hammer to drive in an upholstery tack, does that mean a sledgehammer? And if someone doesn't want to be accused of being an "Ansel Wannabee", does that automatically make him an "Avendon Wannabee" using a white sheet background?
Heck, I use red filters all the time, and I don't get either black skies or blanked out shadows. That's what correct metering and exposure allows. Does anyone here understand the meaning of the term, "nuance". But if, for creative reasons, someone does in fact want pure black, is that a felony? Would you accuse Brett Weston of being an "Ansel clone"? Of course not.
And there's far more to filters than just clouds and skies. For example, this past week I've used a red filter to bring out the patterns of almond orchard blossoms (white or light pink) in differentiation from green foliage, which red darkens. And in the mountains, after a snowstorm, when the sky turns blue again, then all the micro-texture in the fresh snow has bluish micro-shadows, and a red or orange or yellow filter will variously bring that out better in a black and white image, versus a polarizer, which simply flattens and kills it all. Lots of uses; and one more reason to set aside the stereotypes.
And to Mike specifically - apparently you haven't seen much of AA's overall work. Actually, only a small percent of even his landscape images have blackened skies. Sometimes there was a strategic reason when he did that, like processing streaks on the original film, or even the silhouette of a mosquito inside his bellows, and landing on his film just prior to the exposure. If you look at his most famous Moonrise photo, earlier prints did not have a black sky, and were hell to retouch due to all the processing irregularities in the sky. That was symptomatic of old water bath processing technique, in an attempt to control the extreme contrast of the scene involved.
But given all the air pollution and jet contrail stuff now worldwide, it's hard to get a black sky with a filter anyway. Skies simply are not as blue as they once were, even at higher altitudes in the mountains. Only once in the last 30 years have I witnessed a sky as blue, up around 12,000 ft, reminiscent of what was almost routine in my youth growing up there.