I very much doubt that the percentage of the population addicted to opiates is constant across every county in the country, but even if that were true, it's impossible to prove (or disprove) without metrics.

In the real world where there's limited funding, it's just not possible to replace every Starbucks with a treatment center, so communities need to find ways to make those limited resources as effective as possible, and what's more effective than using data about where more opioids are being used?