love dilution

There is such a thing as having too many children. "Love dilution". That is the term I use for large families. I put that number at 4 children. 5 or more children - some of them will feel somewhat neglected and less loved.

That is not to say the parents love any of their children less. I am saying parents cannot find the time to spend equally among all their 4+ children. This is similar but not the same as small children becoming jealous of a newborn's attention.

Do you believe "love dilution" for large families or just a crackpot idea?