I think staging is hard to define. I think sellers think it is critical and a huge reason why they sell, and buyers think they see through it and it didn't play into their decision. I feel like on the sell side there is just some magical hope going on - and on the buy side, buyers don't want to cop to being tricked by it.
So, it is really hard to be objective about it as it all depends on which side you are on at that time.
I work with a busy realtor. She used to be more "don't worry, you need to live here". But she now admits there is an HGTV effect, to the extent that between very comparable houses it will give a seller an edge in our market. There is a lot to chose from, houses aren't unique here, so you want to be blindingly clean with minimal, minimal, truly minimal decor. Decor that is there is completely neutral and "background". Pottery Barn, Restoration Hardware-esque for sure. Don't go nutty with pinteresty-crafty stuff. Kitchen countertops nearly bare. Cabinets and closets hyper organized.
But, all that, it won't "trick" anyone at the end of the day if your house overpriced compared to a similar but lesser staged home, or has issues/problems. But it might make your offer come in faster and beat the very similar house or 2 down the street.
Paint should be a color, but a very neutral "popular" color. If white is a whole theme - decor, furnishings, walls, then white is ok, but that will turn off some buyers who don't have white furnishings. She'd recommend painting and renting staging furnishings.