You're certainly entitled to buy from or not buy from whomever you wish and for whatever reason but the reasons you're saying just don't make sense.
Personally, I love shopping at stores that have liberal return policies because of their return policy. I know I can return that item that doesn't look as good on me as it did on the hanger. Or that bag that didn't hold my stuff as well as I'd hoped. Or those jeans that were slightly too big at the waist and too tight at the hips.
Just because those items didn't work for me doesn't make the store (
Nordies, Bloomies, Louis Vuitton, whatever) a bad "seller" nor does it mean there's something wrong with the item. It just didn't work for me.
Additionally, if an item is returned (on Tradesy) for one of the above reasons, the seller doesn't even know about it! So for me to think that Tradesy's liberal return policy, something that draws people TO their site is actually costing me buyers, it's bothersome.
"Touched by many people?" Do you think you're the only person who looked at and bought any item at any department store? Do you think that your feet are the only ones that have tried on a pair of shoes at Lord and Taylor? Although I'm speculating, I willing to bet that most of the inventory in any department store has been "touched by many," and probably tried on by many people and even bought and returned multiple times. That doesn't mean there's something wrong with the quality of the item.
It's the nature of the business!