Bad example. 14 years is age of consent in some countries, it was acceptable age to marry in some US states until 2019 (still seems possible in Washington) and in many countries arranged marriage is not considered abuse today.

The modern epidemic of abuse is a different beast. Never in the history it was possible to abuse a child, record the process or live broadcast it, and sell access to that to hundreds of people around the world. Technologies that enable this are only recently available (internet, e2e messaging and cryptocurrency).

But even if we pretended it was the same in absolute numbers, that is irrelevant. Yes, things were bad 500 years ago. If people were getting massacred today, you can say that it's all the same as back then, we should not be concerned, it's simply shedding more light on the same old murder. (It's especially easy to dismiss it if you were in the industry that makes tools for it). Or you could call it out as violence, even if it is happening less than in the dark ages, and try to do something about it.