Yeah same, I don’t think I can recall a tantrum my kids had that wasn’t “rational”. Obviously all kids are super different, but for us it’s always low blood sugar, lack of sleep or being “trapped” where he wants do do something he can’t be allowed to.

Could also be sickness or someone fed them juice and ice cream for lunch.

If your kid is normal. Tantrums can indeed happen regularly and without addressable cause depending on the child.