There's a big different between the data being available vs. being put to use. ISPs have no incentive to put a bunch of effort into collecting data from the 1%

There's a big different between the data being available vs. being put to use. ISPs have no incentive to put a bunch of effort into collecting data from the 1% or less of their customers which don't use their DNS servers. Thus, it's extremely unlikely they run packet inspection on every packet just so that they can collect browsing history from people who are privacy conscious.