I don't think bed wetting is that abnormal, even in nt children. Up to age 8 a significant proportion (is it 1 in 5?) will not be dry at night. If they gave out nappies in prescription to every nt child over 4 who still wet the nhs would go bust!
I don't think the issue is being given more help, it's changing the mindset that children who wet at night have a problem, or need "training". It's a biological issue, and until that mechanism kicks in the child will wet. Pull ups and dry nights are marketed specifically to people who think that nappies are "babyish" or are ashamed their 6 year old still needs nappies. I've known people who washed bedding every day, sometimes two sets, rather than admit their child wasn't dry.
When my kids got upset about still needing nappies at night it helped them to know the 1 in 5 stat. 30 kids in their class, so I asked them to pick out the other 5 children still needing nappies at night. Of course they couldn't, so that reassured them that a) they weren't odd, or a baby and b) different to their peers.
I did get a lot of stick of relatives who told me I needed to "do something". One even told me it'd be my fault when they were still wet at 16 . Of course they were dry overnight just before age 7.
Remember, what age they are potty trained and/or dry at night is no indication of iq, genius or stupidity. Yes, the research has been done :)
Of course AN children are different and help should be given if needed.