Is it wrong to put a child on a diet?

When I was a child around 13-15 I was really fat. Like 187 lbs was my heaviest and I maintained that weight until I got tired of being fat and took it upon myself to get down to 123 lbs by the time I was 16. My parents never told me to lose weight. Never encouraged me to go on a diet or exercise. I honestly wish they had. Im noticing my niece is headed in the same direction. She’s 11 and 190lbs and she gets picked on. Im the only one saying she needs to be put on a diet but since she’s a kid they’re hoping it’ll “fall off”. I’ve seen articles stating that children should not be subject to dieting because it lowers their self esteem but so does being fat.
Is it wrong to put a child on a diet?
Is it wrong to put a child on a diet?
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