Earlier quoted context omitted.
It's not the pile of debt that increases the score. It's the history of repaying that debt per its agreed terms that does. While I'm not a fan of the credit bureau system, I understand the reasoning behind it. It's an efficient way for creditors to get access to the needed information. Lacking that, to allow the bank to evaluate your creditworthiness among other things you'd likely have to provide a list of reference…
The point is that the credit score system is utterly dominated by past credit (and its repayment), even though other factors (like current wealth and income) are far more important in practice - and this leads to paradoxical and absurd situations where someone can be filthy rich, but have low credit score because they have zero credit history, never having taken a loan. Many other countries don't have such a system,…
From the perspective of the finance industry, these "absurd situations" are so far below the level of noise that they are effectively theoretical. If you want to discuss "in practice": in practice the users of the US credit system have no "current wealth" worth speaking of (look up the median net worth of US households), and their ability to maintain their existing debt is the defining feature of their financial status.