The problem isn’t infinite growth in a still-growing world, it’s exactly what you posted here: Growth at all costs. The pendulum has swung too hard in favor of growth over stability. This is great for shareholders (read:everyone in America who wants to realistically retire one day) but bad for workers (read: everyone in America, regardless of whether or not they want to retire one day).
Not true.
If he wants to go and divide the stock market up between international and non-international companies to keep score for his own purposes, he is welcome, but it’s unrelated to the conversation he entered.
My own observation is that old people tend to spend less shit on silly things, compulsive purchases and focus on the essential. With an ageing global population I don't think one can expect infinite growth unless the category of services is focused on an older population.
Also society change and some stuff that is needed now won't be needed tomorrow. I don't think there is anything wrong with a shrinking market as long as it is gradual and slow enough that it lets people working for affected companies involved to retire and/or move.
It'd be nice to imagine our society surviving our ruling classes' addiction, but I would not bet on that.
(You might read some essays by recovered addicts to get a sense of the monomania of it, and why they wouldn't about things like "mature" and "stable".)