If it's just an anecdote in the plot, I don't think many people will mind. However, if you want to convey a moral message, it must be done well. Disney is not a good example to follow in that case because they deliver their messages in a crude and insensitive way.
The main thing is to make the message open to interpretation so that, when the player interprets it, they assimilate it more easily because that interpretation is partly their own creation.