"Tended" exactly! not all 80s clothing had big shoulder pads. And if you bought a classic one (not a fashion one) you'd easily be wearing it until it wore out.
That's the whole point, really. 'Fashionable' clothing is for the comparatively rich (eg Europeans, north Americans) who are on the receiving end of pretty relentless marketing and clothes which are significantly cheaper in real terms than they have been for ages. So the profit comes in getting us to chuck them and re-buy.
Now of course it's absolutely fine to want fast fashion. It's just a shame that it's rise has made it so much harder to buy things if you want to dress in a more enduring way to suit the personal style you have honed over time.
It is completely possible to supply a range of basic jeans shapes, rather than racks being minor variants of one or two styles. But it doesn't suit the industrial model of money-making to do so.
(Navy is my basic shade. I do agree that some look considerably better than others)