So, by this logic, it is impossible to ever say that any system is ever not particularly good for any particular things?
I can bill D&D as being precisely as good at literally anything as any other system, regardless of design differences? I can bill any other system as precisely as good as D&D at turn-based combat?
Because that's the logical result of this argument. No system can ever be better or worse at any use, no matter what. And I find that claim completely ridiculous. FATAL is just as good as D&D? Absolutely the Nine Hells not.
For many if not most things, better will always be a matter of opinion and what people value. If it's faster in game X to build a campaign world but I don't like the result, faster has no value to me. Some people prefer a more structured to some aspects of the game with clear and transparent rules determining outcomes instead of the judgment of a GM. What they consider arbitrary I consider immersive and engaging.
What's better for you is not automatically better for me. Especially when there are so many declarations of better followed by nothing more than "it's better because I say it is" or a copy of the preferred rules. Reply that those rules don't make for a better game for me and the response is typically that I just don't understand the rules and how much better they are.
In other words tell me all about your favorite French restaurant that you believe is so much better than my fast food burger joint. Wax poetic about atmosphere and the pairing of the perfect wine with your meal. It's never going to matter if I don't like the food your restaurant serves and I prefer a chocolate shake over an expensive glass of wine any day.
It's interesting to discuss different ways of doing things sometimes, but it's up to me to make the final call on whether something is better for me.