underscore is a good counterpoint. jQuery is a great library, but I think it's arguably not what people mean when they talk about standard libraries, which has more to do with the question of why in the world there's a leftpad package.
> Why is JS having package management seen as a downside? It's an upside in every other language community
FWIW I'd say that thinking of package management as an unqualified upside in any language or environment is a mistake, though getting deep into that argument is not on my to-do list for the day, as convincing anybody who isn't naturally amenable to it would probably require going over the groundwork involved in groking JWZ's famous quote about regular expressions ("Some people, when confronted with a problem, think 'I know, I'll use regular expressions.' Now they have two problems.") and some philosophy about automation and the attention economy.
But package management is convenient for sure, and there's any number of situations in which I use it and am happy about it, particularly when I'm installing things where I'm primarily a user rather than a developer. The specific complaint about JS is based on the observation that the dependency tree seems to be fine-grained and transient in what seems like an unusual way to me. In that situation, I suspect the problems that come with any other pm system are likely magnified, including developer dependency on it, which moves from convenience towards necessity.