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For me, it is selfish to add materials to the game that will negatively impact the play experiences of others, simply because you can't be bothered to house rule it yourself. I have hinted at a good argument for why it will negatively impact the play experience of others. Allow me to expand it.
The people who want more detailed magic item creation rules are primarily those who like it from 3e and 4e. In 3e and 4e the magic item economy and wealth by level were assumed parts of the game. Based on human psychology, if those rules are included, most of those players are going to transfer those assumptions over to the game. If that is a significant amount of the player base, then it will become part of the standard assumptions of the edition, which everyone else will then have to either deal with or actively over-rule and re-educate their players on how that isn't the way it works in their campaign.
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I consider imposition more selfish than deprivation. Maybe that is the root of disagreement.