Nope not at all. My best female friend has a body almost identical to yours and lemme tell you she definitely looks great in everythang! Most of the time fashion people don't know what the hell they are talking about. Something else to think about, most fashon people don't really have that hourglass look now do they? They don't want you too look even better lol . JUsrt wear what makes you happy girl and you know you can wear anything. We both know you like dresses better though ;P haha
I don't think so, but you have to know how to style it right. Look at Sofia Vergara or Beyonce (not hourglass, but she's still curvy) or Kim K. They all wear skinny jeans really well even though they are hourglass/curvy. And frankly, a lot of those sites are a load of bs.
No? Maybe I'm biased since I have an hourglass body shape and wear skinny jeans but the only fashion advice I've ever read about jeans and hourglass body shapes is you have to make sure they are fitted in the hip and thigh area and NOT loose around the waist(cause the waist would be smaller)