This is a complex subject. Yes I think that photogenic and often white children get more media attention (unless the tabloids are trawling for any story to back up their 'all social workers are twats' stance).
I do not believe that children from minorities get less attention from the system though.
Sometimes the opposite is true. I hope that things have changed a lot in recent years but historically there has been a problem with professionals bringing their own cultural values into practice. For e.g. it may raise red flags that a young baby lives in a house were multiple adults have access to the child and the child appears to be handed from person to person. In some cultures this would be seen as normal and healthy, in others this would be seen as disruptive and neglectful.
Research in the 50s (?) concluded that West Indian mothers were so dreadful that all West Indian children would be better off in care
The Victoria Climbe case showed the opposite end of the spectrum. It was assumed that the 'master and slave' relationship between Victoria and her 'aunt' was perfectly normal and healthy in African families
These ideas will inevitably trickle down and end up in the DM (they love a good SW story).
So YANBU when it comes to the media but YABU when it comes to real life social workers.
I could write and essay on social services and minority families (including those with disabilities) but it would be long and boring
(have pasted this because I didnt realise there were two threads)