I think you're missing the point I was making with that. Yes, having the magnets on a weaker setting will make them not as strong and less noticeable.
This is true and obvious.
The point I was making is that you are saying that piece magnets are the "MAIN" thing and that core magnets don't impact "your", (whoever you were addressing) solving as much. I made the point that your claim is is not absolute because it completely contradicts my experience. In my experience core magnets are more important and I prefer less magnet strength in my edge-to-cornet magnets.
Now, of course, having weak edge magnets will make the cube less stable and more, let's say, flexible. To counteract this you need stronger core magnets. This makes core magnets an essential customisability feature and something that I personally put more of a priority on.