Could parents emphasis on the value of childhood innocence over their childs ever approaching adulthood be a problem for them and their children?

I’ve noticed the parents frequently lament about how fast children grow up. They say things like “before you know it they’ll be all grown up”, “I wish they’d stay that size”, and “I just think children should be children for as long as they can because before they know it, they’re adults”. The fact is I hear parents express negative sentiments about their childrens’ impending maturity more often than positive ones.

I don’t think any of this is conscious, but I can’t help feeling that an idealization of one segment of life over another is not healthy. Especially when the idealized period is a vital part of preparing for the devalued period. What do you think of this and the idea that the value of childhood is tied to innocence and the ills of adulthood to the loss of innocence? Does this encourage (intentionally or unintentionally) stunted development?