Boiled down to its essence, your argument ("Everyone does it") reduces the quality of discussion. Part of it is stripping nuance, and also part whataboutism, and thought-terminating cliché.
If someone comments that "Qatar produces a high amount of greenhouse gases", a reply that says "Every country on Earth produces some greenhouse gases" is low quality; can we instead talk about CO2 production, compare trends, dig into why Qatar's per capita emissions are so damn high, and what can be done - if anything - to achieve the idealized version of the world with less climate change.
If someone comments that "Qatar produces a high amount of greenhouse gases", a reply that says "Every country on Earth produces some greenhouse gases" is low quality; can we instead talk about CO2 production, compare trends, dig into why Qatar's per capita emissions are so damn high, and what can be done - if anything - to achieve the idealized version of the world with less climate change.