Is this harmless spoiling or something that should never be said, not even as a joke?

My mother likes spoiling my son more than she ever did with my brother and I. It's understandable that she's very happy since he's her first and only grandchild. However sometimes she tells my son (now 6 months old) the following:

''Kenny, your mom and dad aren't ever going to hit you. You're so lucky. You'll get to do whatever you want to''.

I hope my son doesn't ever get the wrong idea that not ever getting hit by parents means permissive parenting. It doesn't. Just because there won't be corporal punishment doesn't mean he can do whatever he wants to. Would you consider what she's saying harmless spoiling or something that should never be said?

Updates
6 mo
I'm not into physical punishent but neither into excessively spoiling a child with rewards.
Is this harmless spoiling or something that should never be said, not even as a joke?
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