Its not about OOP but the probability that those two functions will diverge. Linked elsewhere in the comments too, this article (https://sandimetz.com/blog/2016

Its not about OOP but the probability that those two functions will diverge. Linked elsewhere in the comments too, this article (https://sandimetz.com/blog/2016/1/20/the-wrong-abstraction https://sandimetz.com/blog/2016/1/20/the-wrong-abstraction) is probably better at articulating the point.