I don't think its a case of a studio/TV/HD showing a system for what it is compared to a photo image. If anything, those particular cameras/lighting distorted the look of the quality of the hair itself combined with there being too much product on the hair..
There are plenty of HD videos of replacement hair that don't make the hair look like that.

Those systems were obvious as wigs because they hadn't been designed with any consideration of who was wearing them and their features.

With some thought, some effort and a decent system, there is absolutely no excuse for hair looking that bad.
Unfortunately I see it time and time again emerging from so called professional salons.
I believe the people who go down the DIY route are getting the best results these days.