When I was a new groomer, it was common practice for customers to bring badly matted dogs in, fully expecting that we would dematt the animal. And we did. It was a routine event for groomers to invest hours removing tangles, and rarely did we charge extra. It was all in a day’s work.
There is an old insult that states that so-and-so is so unpopular that ‘he couldn’t get elected dog catcher’. The insult is especially nasty because dog catchers are rarely the most popular people in a community and the job itself is generally undesirable.