You can import it as a medium-term solution - no problem. We do that in a bunch of places in core.
We’ve enabled the ESLint rule to give us a better view of how much JQuery is still being used, so that we can eventually aim to remove it completely.
So, in the long term, yes it would be much better to update any uses of JQuery to use native browser APIs. We’ve been doing that slowly over the last few years in core, but we have no specific plan or timeline on removing it.