I find it very amusing that the OP started out with a post about spending $500 for their entire bedding set and it quickly devolved into people haphazardly misquoting the OP as having spent $500 on only sheets.
This was then followed up by people commenting on spending $500 on sheets alone not being worth 10x as much as spending $50 on sheets (or something to that effect). Kind of like the passing a message game, but worse because anyone could easily refer to the OP before claiming that their spending $500 on sheets is crazy.
Except it wasn't an entire bedding set,
"After lots of research, I bought a West Elm linen duvet cover ($160), a lightweight silk-filled comforter on Amazon ($140), and a single flat sheet (used as a fitted sheet) from Rough Linen ($160). Spent almost $500 and didn't even get a top sheet or pillow cases (already had decent cases, and not using top sheet). "
At least to me, calling it sheets or a bedding is pretty much the same thing, I "change the sheets" even if it involves more than just the sheets.
If you have the money and it matters that much, good for you. To me $160 for a sheet or $460 for 3 pcs is excessive.
I'm not sure what the OP, or anyone for that matter, expected the responses to be. The next form topic below this one is "Share your badassity", I'm not sure where or how buying, what to me are luxury goods, fits into this forum.
If I spent what others would consider excessive on some item(s), I wouldn't start a thread about it.