Babysitting is an incredibly hard job constantly undermined by the greater workforce, as well as some of the parents that hire babysitters.
In theory, parents would be willing to pay a good price in order to ensure their children are cared for by someone equal parts loving and professional, and many are (within their means), but there are still sadly a lot of people who low-ball young babysitters through emotional manipulation.
If you're a friend or extended family member, there is often an expectation that you'll babysit for free or very cheap. Obviously, if you're super close and want to do the favor, these arrangements can be lovely for all parties. But there are times when parents try to wrangle a friend or family member into free or underpaid work simply because they cannot afford, or don't want to shell out a professional fee. In these cases, being ask for a full professional rate can send families into a spiral.