Killian’s father also abandond him and he abandaned Bae in a way. In real life, many people from all walks of life deal with father abandanment so that theam really strikes a cord with the audience.
Eh, we don’t know for sure that Hook was abandoned by his father, he could’ve concocted that story to get Bae to spill the beans about Rumple and the way to kill him, especially given how similar it is to Rumple’s own. I’d wait for a Adam or Eddy confirmation or a Hook flashback before accepting that as the truth.