All your statements are true 🤷♂️
In absolute terms *everyone* is better off in terms of income and health than say 100 years ago. This is a fact.
At the same time in many developed economies the gap between low-medium income and high-income groups has *also* widened, creating (fully justified) social tensions.
Peter Turchin presents a very good picture of this based on socio-economic data in the US: