Consumer luxuries don’t actually make for a better life.
The fundamental luxuries do.
Humans spend a third of their life asleep. A good mattress makes a big difference in the quality of sleep, but it being a Cali King sure isn’t going to change much.
Modern life requires a high degree of physical mobility. Public transportation (Europe, etc) and cars allow us to cover distances in hours that would have taken days even a century and a half ago. A decent-quality vehicle can make a big difference in the reliability of said transportation and our ability to get around, but it being a Mercedes or a Bentley sure isn’t going to change much.
And the list could easily run to hundreds of examples, if not thousands.
We live in a world where most any first-world consumer item is a luxury compared to the global poor, or pretty much anything comparable from a century and a half ago.
What doesn’t have much of a positive impact, however, is the delta between an affordable item and a high-end item that costs many multiples more. People can and should aim for those “luxuries” that don’t yet tip over into deminishing returns, as opposed to those luxuries that are excessive purely for the purpose of producing excessive displays of wealth.
Like vehicles - both of mine (sedan, utility pickup) are approaching a quarter century of age. Could I afford brand-new vehicles? Sure. But why would I waste my money and planetary resources like that? The ones I have still work just fine with only basic maintenance, and are perfectly adequate in getting me (and cargo) from point A to point B. I have absolutely no ego that demands newer or fancier.