Sources? Statistics? Anything to back up your statement?
Ordinary Physical Punishment: Is It Harmful?
Comment on Gershoff (2002)
Baumrind et al., p. 585
"Parents who escalate to abuse from disciplinary use of CP are
likely to share a distinctive set of attributes (Baumrind, 1995;
Vasta, 1982). Abusive parents are more likely to be hyperreactive
to negative stimuli and to have an extreme need to control their
children. Their punishment is less contingent on the child’s be-
havior than on their own inner state. Rather than having flexible
recourse to a wide range of disciplinary tactics, such as time-out,
induction, persuasion, and denial of privileges, abusive parents
rely monolithically on their greater physical power to intimidate
their child into compliance. Their anger is explosive, and they hit
impulsively in response to their own frustration rather than to
correct the child. As Gershoff (2002) stated, it is important for
future research to determine for whom, in what contexts, and when
purposeful “corporal punishment is transformed into abuse” (p.
553). As her term implies, a qualitative change must occur for
ordinary physical punishment to be “transformed” into physical
abuse. Thus, in a study of affluent, well-educated families, those
parents whose recourse to physical punishment was excessively
severe and frequent also engaged in significantly more negative
interactions of other kinds including verbal abuse, being signifi-
cantly less warm, supportive and consistent, and themselves ex-
hibiting more internalizing and externalizing problem behavior
(Baumrind, 2001).
Just as addictive personalities should not drink alcohol or use
drugs, some parents—those with a low tolerance for frustration, a
history of violence, an inordinate need to control others, and those
who are impulsive, narcissistic, and immature—should not spank."
here.