Absolutely right!
Up to each user to choose whether they try different DAPs/IEMs/Cables or not. Or make various tweaks.
The beauty for some people, is that the DAP is enjoyable "as is". And for other people, it is even more enjoyable, each time they squeeze a little more out of it. Some with different IEMs and Cables. Some with various tweaks to settings. Some with internal wiring mods.
Some are happy just turning the DAP on, and enjoying it.
Each can do as little, or as much, as they want. Each person decides for themselves, as it is their own ears that they need to satisfy. Nobody can decide for somebody else.
There are some things that make no sense to me, whether due to belief/science, lack of money, lack of interest, etc., so I read about them as an observer, happy for the people who are enjoying those things, but knowing it is not for me, AT THE MOMENT.
Maybe I'll explore those things at a future time. Until then, just something to make note of, as something unexplored.
But I would certainly not judge other's interests, if I have not tried, and have no experience with it. And even if my experience is different, that would not be definitive proof of anything, as there are so many differences in system, music, ears that could change the results. I have seen beliefs overturned too many times to believe that there is nothing left to learn.
