As with drinking water, you need to have a goal (e.g. surviving) to say need. I suspect GP was saying that they need to do that to have a non-parasitical relationship with open source projects they use.
I mean, parasites get to sit around in the host and have a free lunch. You don't cure malaria by yelling at a bunch of Plasmodium falciparum about how they should be ashamed of themselves.