Losing Kills in an attempt to ks

Ok hear me out but this happens way to much in lower elos where people think kda wins games. If I am behind you finishing off someone and the person you are chasing is ONE AUTO From DYING Do Not Turn Around And Try To KS Me Instead Get Your Kill And Let Me Get Mine So We Have More Gold Flowing Around The Team Especially Early. Also I Do Not Care If I Am About To Kill Someone As Support And The Person You Are Killing Is 1 Auto From Death Let Me Get The Kill Just Because I Am Support Doesn't Mean I Should Not Have Kills, Especially When You Say I Am Feeding At 5/8/28 As A Support