I understand the nature of the issue just fine, thanks. Texture stamps are common, period. Victoria may not use them, but there are thousands of others who do. Skin, leather, fur, armour plates, feathers on snakes, dinosaurs, lizards, insects and birds etc are used quite often. It's not just a technique for bases and terrain, though it does work well for brick, cobblestone, tree bark, stone, etc. Keep in mind, sculpting is used in many more areas than our "28 - 54 mm miniatures"...notice I'm saying "texture stamps", not specifically "Scibors filigree stamps"...
Nothing is necessary. You can sculpt all the details with your fingers and finger nails if you want to be some sort of purist. Tools just make it easier. Where you draw the line seems arbitrary at times. I don't see anyone freaking out about airbrush artists using camo or snakeskin stencils...I don't understand why using a push mold is so different. I can understand someone not liking what can be done with the filigree molds, as I mentioned, much of it doesn't appeal to me personally, but I don't understand why it seems to rile up such disgust. Incomplete details on the figures and IP infringements are a related but separate issue.
"I never did understand how a bona fide "texture" stamp was very useful for a mini... how do you get the texture around the body parts etc? For bases I can totally see it - who wants to sculpt cobblestones or tread plate five times? "
Many are made by the person using them, so they're designed to suit the user. Generally they're either flexible enough to push into the model where it's needed OR the putty is pushed into the mold, removed carefully and placed on the model while still pliable. It's not always a viable or time saving option but it can really save a whole lot of time and anxiety on reptile/snake skin "animals" and cloaks and all kinds of things (like huge fancy shin guards and shoulder pads). That being said, I haven't seen many designed and sold for the sort of miniature scales we're talking about. So if you saw some for much larger scales (or if it was for wood or leather or something totally unrelated), that might have been the cause for confusion.