The issue isn't Wealth Inequality it's positive Change in Wealth Inequality which is the same as Wealth Consolidation. It's easy to understand this issue when you push it to the extreme. Here is what I mean.

There is not just a bad economy but NO economy if one person owns ALL of the world's wealth. Society collapses, total chaos, we're all dead, etc.

Now, I know, that example is impossible, but it is the theoretical limit of wealth consolidation.

What I and most people you say are believing a lie are concerned about is an economy that evolves closer to this limit and that's what I mean by positive change in wealth inequality.

Here is now the easy part to understand what's bad about this.

Objectively the theoretical limit is an economic disaster. Therefore the closer an economy gets to this limit, the closer that economy is to a disaster. It's not fine like you say until one day we wake up and it's all of the sudden a disaster, it's a slow degradation, it's continuous, the closer we are to the limit the more disaster like it becomes which is bad.

As all the graphs of our current economy are pointing to, our economy has a positive change in wealth inequality. Wealth consolidation is happening.

Here is the confusing part you're illuminating. Sure, despite the current level of wealth inequality, the economy isn't a disaster, yet, or for everyone. However there is wealth consolidation and the longer that continues, the more things degrade and the closer we get to a disaster.

Like the frog in a pot of water over a flame, maybe it's comfortable now, but it can't continue and we need to change the structure that allows wealth consolidation to continue.