Wish is just a platform for these sellers.
It is essentially an eastern version of ebay for companies.
I use it a lot for small bits where quality does not matter massively or sometimes gamble on better things for a little surprise. I have ordered loads of stuff from them and they always deliver, if a bit slow at 2-4 weeks.
I order small fishing tackle like floats, weights and stuff like that. Kitchen and house gadgets are alright to order there. Much of the small stuff is legit and from the same factory as the stuff you get here, just sneakily sold from the back of the factory in china.
Really it depends what you want to buy. Things that don't exactly require complex manufacturing or electronics is fine, clothes are a risk due to size and quality variation. Take the pictures with a big pinch of salt though.
If you purchase 6 different things and you are only happy with 4 of them, you are still laughing at their prices.