Even if true (which is not, because these figures are based upon Hamas lies), it constitutes evidence of Israel trying to avoid civilian casualties. Over 47% of Gaza's people are children; if children are getting killed at a lower rate of 40%, that's due to Israelis trying to avoid civilian casualties. The true number of children is much lower even than that though since Hamas lies about deaths, especially civilian deaths, as we've seen in 2014 and we saw more recently when Hamas claimed Israel blew up a hospital killing "hundreds" when in fact an Islamic Jihad rocket malfunctioned on launch, landed in the parking lot, and only killed a dozen. https://www.usnews.com/opinion/articles/2014/08/12/hamas-lies-about-the-gaza-civilian-death-toll-and-the-media-bought-it