That depriving Iraq of chlorine, which was needed for water purification, resulted in a humanitarian crisis due to lack of clean water, is not in dispute.
Getting back to my original point, if the sanctions hadn't lifted, what do you estimate would have been the cost in lives from continuing the sanctions to Iraq.
Could have provided but Saddam refused to let inspectors escort the chemical to the water treatment plants and monitor its use, to ensure none of it was diverted for weaponeering purposes.
On him and his regime, not us (is that you Tom?).
Loss of lives due to sanctions is not on us (US). Sanctions could have been lifted at any time if he complied.
Therefore your question is immaterial to the issue at hand because he made and used chemical weapons against his own people and was reconstituting his WMD program.