People are motivated for the top of the ballot, I think it is fine to criticize the Clinton campaign for how they handled Wisconsin.
Again, the 1000 vote difference is statistically the same and would not qualify you to make your argument in any academic paper. By your same logic, Trump's economic populism did not work because Ron Johnson ran 70,000 votes ahead of Trump, and since Gary Johnson also got 100,000 votes. If Clinton peeled off just half of Jill Stein's economic populist voters or was able to organize to get voters the IDs they needed, the interpretation of the results would be that Trump's populist message failed in Wisconsin.
Unlike Pennsylvania or Florida, Wisconsin was not the case of Trump massively overperforming versus Romney and bringing in a surge of racist new voters--he only got just 1300 more votes than Romney. All indications are that Wisconsin was for the Clinton campaign to lose.