I've never employed the services of a decorator, or a gardener, or a fencing contractor, or a tiler, or an oven cleaner, and I'm sure I'm not alone in that.
And yet somehow these types of trades people still have work

We all like a bit of diy, some of us are adept at it and some of us will realise after trying a particular job that we're no good at it, or that we can't achieve the desired results.
We all agree that a relatively small percentage of the country use professional carpet cleaners, therefore that leaves a large percentage of people that are titting about with rug doctors, or indeed not having their carpets cleaned at all.