That is absolutely not a faulty conclusion in any objective sense!
Now, you get to say it is faulty, and when one thinks about it for a minute, that idea packs a whole lot less punch.
Just want to dilute some unnecessary implied authority out of this otherwise interesting discussion.
Frankly, I always learn the defaults for the high value idea of reducing my overall configuration and maintenance workload!
Secondly, when I communicate workload to others, I don't have to do as much because the defaults are in place and useful.
These days, I tend to run defaults everywhere I can. Doing this means I do not have to a ton of configuration when setting up new environments.
I have also found those defaults do make a lot of sense. Maybe not the absolute peak sense, but more than enough.
I end up able to move and do a lot very reasonably quickly.
I also find my skills do not need to refresh as often too.
In any case there is plenty of room to disagree here, sans the idea of someone's conclusion being " faulty.