Look at the heads of state in the examples you provided and identify the generation to which ALL of them belong.
True, and I'm not offering excuses but it's always been that way—read my second post to Zetobal.
Putin can't step down from his role, the people who put him there will make sure it ends badly for him. The people in these conflicts all want to make sure their reserves stay safe, it only takes one Houthi rebel to ignite the tinderbox.
No matter what age that rebel is.