Why does it kill creativity? That's the biggest bs so far in this thread. The bg isn't the most important part of a photograph it's the client. I like to vary my bgs, sometimes hi key white, a graded grey, low key black, I even have purple, orange, pink and yellow. etc etc. I don't feel any less creative based on What colour the bg is.
If its studio portraiture the important issue is the main light and more importantly than that the interaction and posing of the subject.
It doesn't
need to kill creativity, but in reality it often does.
It isn't the white background that kills anything, the colour of the background is just a question of taste, style or personal preference.
The problem is unwanted light that causes problems, especially in small spaces. One problem is flare, created by over-bright light from the background.
Another problem is that the background is sometimes far too wide. Wide is good, but not when combined with close. Wide + close. A primary reason for the over-bright light is that people don't have enough lights to light the background evenly, so they just turn up the power to blitz the background, causing the flare problem. The flare creates an overall loss of contrast, which the photographer then 'corrects' by murdering the contrast and saturation. Increasing the contrast does horrible things to shadows, so lighting tends to be unbelievably flat, which makes everyone's face fat - although of course the faces look fat anyway because of wrap, which is the next potential problem.
Wrap is unwanted light from the background spilling onto and lighting the sides of the face, body, you name it. it makes everyone look fat and makes it impossible to control the light falling on the real subject.
Of course, none of these problems (there are others but these are probably the main ones) need to exist at all. Having enough space and enough understanding of light can result in a pure white background
without the background contaminating the main subject and destroying creative lighting - but unfortunately totally flat, over processed images with false skin tones, no detail, flare and wrap are pretty common
Yes, it's possible to be creative with poses and interaction, but these aren't by any means the only qualities of a great portrait.
I have a lot of sympathy with the chavground arguments, right up to the point I cash the cheques from my clients for shooting them. Then I really don't mind doing them
Yep, it's all about money and I fully accept that there are still a lot of people who like chavground shots. But a lot of people have dropped the chavground look altogether, and reported better sales.