No, he's actually saying that the new minivan is more expensive even if adjusted for inflation, due to being a different product with more features, reliability and whatever. (You can't just opt out of those things because the available vans are what they are, and so you just have to pay more).
This is in keeping with the theme of the tweets that there are non-inflationary factors that are increasing costs above inflation, such as increased shared risk in health insurance driving up costs for the median. (You can't opt out of that new shared risk because some insurance powers that be have included that in the policy and premium calculations, and so you just have to pay more.)
Thus if those two minivan prices are actually identical if adjusted for inflation then that ... sort of does deflate the point he's making.
This is in keeping with the theme of the tweets that there are non-inflationary factors that are increasing costs above inflation, such as increased shared risk in health insurance driving up costs for the median. (You can't opt out of that new shared risk because some insurance powers that be have included that in the policy and premium calculations, and so you just have to pay more.)
Thus if those two minivan prices are actually identical if adjusted for inflation then that ... sort of does deflate the point he's making.