The four-year-old is on the floor, screaming, because the banana broke. One parent drops down, soft voice, "you really wanted it whole, that's so disappointing." The other parent, watching, feels their jaw tighten: you are teaching him that losing it gets him a hug.
That's the fight. One camp says connection comes first, that a child learns to behave from inside a relationship that feels safe, and that correction handed to a melting-down kid just pours fuel on the fire. The other camp says that's how you raise a small tyrant, that kids need firm limits and real consequences, and that "validating" a tantrum rewards the exact thing you're trying to stop. One hears: you're going soft and they'll run you. The other hears: you're scaring a kid who's already overwhelmed.