I've never read that "conventional wisdom" anywhere.

I suspect that the sources from which you read that "conventional wisdom" were doing so either to downplay the importance of further vaccination or setting up strawmen to downplay the effectiveness of vaccination. It sounds like something baseless that btd would trotted out there.

And there could be any number of reasons. For starters, use of the (at least one dose) number is designed to inflate the protection. That's a sign that one is not using honest argument and is trying to get a particular answer. It looks like 78.68 percent have one dose and 70.43 are fully vaccinated. There has been a push in the past few weeks of people getting their first doses who are not yet fully vaccinated.

Possible reasons:

Cherry picking data to a point in time. The last I looked at this issue last month, states with lower vaccination rates were clearly tending to be hit harder. It was predominantly a red state wave. Vermont still had a higher vaccination rate than average in June and July and there was virtually no spread. Given the 2-month wave trend that we've seen from this pandemic, we are naturally seeing those states coming down from peaks. And naturally some other states are rising, as we've seen throughout the pandemic. But it's folly to choose this particular time and conclude that this is the most instructive time to determine a relationship, given that the virus waves don't hit each region or state at the same time. To show the effect of the vaccine, you'd have to ask was Vermont doing better than other states during their valleys and during their peaks compared to other states.

Random variance. There will always be random variance. Outlier data is a normal part of random variance. You can't disprove a trend by pointing out one state's contrary data. Opportunity for variance is higher when looking at smaller state populations. A couple particularly effective webs of spread hit a bigger percentage of the population, whereas in a bigger state it would be a blip on the screen.

What are school rules like? Given the high vaccination rate and the low likelihood of serious health consequences for kids, are schools generally unmasked now? What are the precautions there? Could they be removing those precautions earlier than other states with lower vaccination rates? That would drive higher case counts among the unvaccinated.

What are other public rules like? Has the behavior of unvaccinated adults changed in response to loosening restrictions making them more likely to spread COVID than they were a few months ago.