If you are a creative person you need to have the means of being creative. If your creations are textile based you need those textiles
I've got maybe a dozen lengths of fabric big enough to make a whole garment from - and the reason I've got so many is the pot-luck nature of internet shopping, in the days of proper bricks and mortar fabric shops I never had that much. But I also have lots of smaller pieces, both FQ and smaller for patchwork and left over bits from garments - and some of that is internet shopping related because so often you have to buy by the full metre. Those bits might sit in the cupboard for years before they get used.
Over on the
Mate your Orphans thread I've been winging about the difficulty of finding an exact match colourwise in a fabric to go with a pink and blue jacket. I did eventally find some rather expensive silk and bought just 70cm of it, just enough to make a sleeveless top, but guess what I found in my bits box! Two small pieces of pink satin lining fabric, in exactly the same colour as the silk, just big enough to cut the facings from.
If I hadn't kept it....