There's a set of priors that everyone has going into this election, and honestly I kinda share them, by which the fundamentals run counter to the Democrats because of incumbency + economic conditions.
But we keep getting data points in, not just in polling, but with special elections as well, that keeps showing that (at least as of this moment) it's not a red wave scenario, and yet all that data seems to be getting thrown in the trash because of those priors.
Do the fundamentals point to a Johnson win? Yes. Does he stand a better chance of winning in November than Barnes? I'd say the race is no better than a tossup for Barnes, even with this poll. People aren't tuned in as closely right now, it's been a good news cycle for Ds and that will likely not continue much longer.
My only argument is that people need to be open-minded to scenarios in which priors aren't confirmed. Johnson is yet another candidate who isn't well liked (even if he isn't Oz levels of bad).... it's not unthinkable that he'd lose, particularly if one believes Ohio is actually in play (which I don't)