Not a parent yet, so take this with a big grain of salt.
But if I were to talk about piracy from a moral standpoint, I would first talk about stealing. Yes, we all know it's not the same, and it isn't, but there will certainly be someone who says it is, and it's better to clear that out. Besides, there are some parallels.
Stealing is reprehensible, but extremely so when you steal for someone who much needs it himself. Shoplifting is bad and can lead to serious consequences. Stealing money from a poor person is extremely bad and can't be justified.
Stealing is when you take something and the owner doesn't have it anymore. Piracy ain't that.
Then a bit on moral and legal grounds of piracy:
While piracy isn't stealing, piracy does decrease profits of the rightful owner. When you pirate from someone who does not profit much off something, it's same as stealing from poor man. Piracy is impactful, and it's important to remember.
Piracy may lead to legal consequences, which is why one shouldn't normally pirate stuff regardless of morality. But if the conditions of rightful ownership (cost, regional or use restrictions etc.) are inadequate, there exists such a way.
And in any case, I think the later you tell your kids about "illegal doesn't mean bad" the better. Could save a lot of trouble IMO.
Worth noting that the absolute best quality Deezer has is 44,1kHz 16-bit lossless, and most songs there are MP3 anyway.
If this is good enough for you, absolutely go for it. If you're looking to download high-quality music from a streming service, you can use tidal-dl (or tidal-gui for more convenience) combined with Tidal - though it's worth noting Tidal has been subject to some controversies regarding some of the master quality albums, too.
Not a parent yet, so take this with a big grain of salt.
But if I were to talk about piracy from a moral standpoint, I would first talk about stealing. Yes, we all know it's not the same, and it isn't, but there will certainly be someone who says it is, and it's better to clear that out. Besides, there are some parallels.
Then a bit on moral and legal grounds of piracy:
And in any case, I think the later you tell your kids about "illegal doesn't mean bad" the better. Could save a lot of trouble IMO.