The concept of "tough love" can mean a lot of different things and dismissing it as having "no value" is painting with too broad a stroke.
In this specific instance, it's helpful because kids need to learn at some point that they can't always cry to get what they want. This absolutely has value because otherwise they continue that behavior as toddlers (and sometimes even past that if you keep enabling them...).
Gives me Simpsons vibes.
Chalmers: Ah- Aurora Borealis!? At this time of year, at this time of day, in this part of the country, localized entirely within your kitchen!?
Skinner: Yes.
Chalmers: ...May I see it?
Skinner: ...No.