I can't listen to that now, but that quotation looks at least half right. WW1, Vietnam, and the Iraq War were basically all failures, even if WW2, Korea, and Desert Storm were more or less beneficial (at least for us). To say nothing of the interventions (e.g. Libya) that stopped short of full-on war.
But I will say that her CNN town hall was basically unwatchable/unlistenable. I guess she's trying to convey seriousness/non-bitchiness to look like the opposite of Kamala Harris, but she's so monotone and scripted in her speaking, basically Gerald Ford-tier. No matter how good her policy is and even if you have a 1968 repeat where the two frontrunners die, no one that boring can make it in the polls today.