It’s more like stealing my time and creative effort. Set aside creative effort for a moment. Why is it OK for Google to steal my time? My time is unique (it’s mine and no one else’s, unless I’ve agreed to give or sell them my time) and it’s a limited resource.
Google is in a very hypocritical position here. They don’t freely give away all the products of their time and creative efforts. If they want to use someone else’s time without asking, they should at least publish all their code, every single memo and work related email. Google takes freely, but doesn’t give back freely.