Granted when we have a kid, we don’t think we’ll be telling them that “Santa is just a famous character of Christmas, and some people have fun believing he’s real, so don’t ruin their fun either”
Sorry if I'm misreading this, but personally I don't see a problem in telling your own kids that Santa isn't real.
You can still give gifts if you want, and having them be addressed from people you care about makes it more meaningful tbh. Plus, it's kinda fucked up to normalize lying to your kids