That's not true in my experience, but the point was more about environmrntalism. I don't need an entire pair of shoes' material to be sourced, prepared, transported etc. just because my soles are wearing down.
I often hear this argument but from my personal experience it is wrong.
Doing a full repair of shoes cost me like 20-40€ (soles, insides, small holes) and lasts for 3+ years.
Yes, in Europe this is no big deal. In the US there are very few shoe shops that will do this kind of work. When you find one, they typically charge a lot - $100+.
That's a problem in and of itself I think. We need to shift attitudes more towards repair, and as part of that we need skilled tradespeople who can repair stuff.
Before we can do any of that we would need to fix the race to the bottom mindset. Even with new materials and shipping, it's cheaper just mass produce in a third world country than to pay someone's labor to repair here. That's going to take changes to global trade and domestic income/pay.