Doing the profile scan can add hundreds of blocks to the World Gen tab, depending on the modpack. It would be easier if scan-blacklist.txt could be scan-whitelist.txt instead, as listing the ores you do want would be a lot more concise than listing the blocks you don't.

Is it possible to do something like this in the current version?

Could be an option for when I rewrite it for 1.15+, however you could also just remove those entries manually from the scan results json.