Sure, but I'd vote for doing things right to begin with rather than waiting for complaining users. But I guess we might disagree on what 'right' means in this context. :)
There is another aspect too: when everything is in the stdlib it forces developers to collaborate and not create their Nth implementation of the same lib because theirs is better. There is a breaking point in number of developers where it becomes more efficient to distribute the work trough a package manager but then you also introduce package hunting which can become quite a time consuming task.