I smell something fishy

What’s going on with the recent attack of Bitcoin? Elon musk says Tesla will be accepting it as payment but later comes out and claims it’s leaving to big of a carbon footprint? All while selling cars charged by the grid.... I’m seeing study’s conducted by banks claiming “Bitcoin is using 66% more electricity than it did in 2015”. Reminds me a lot like big tobacco and their studies finding tobacco doesn’t cause cancer. What’s going on here?