No, this means inflammation lowers during that time for -a- reason. Not necessarily because of fasting. It could be that you're cutting out something that your body doesn't like, not because of fasting. It could be a lot of things. Thats why a lot of people self-treat thinking X thing is great when it's really some other convenient thing that is only marginally related.
I'd hardly call it a 'tool'. It's more a thing people do that gets wildly mixed results, depending on what echo chamber you happen to be standing near at the time.Fasting is a tool among many and some love and others hate it but no one needs to be forced into it.
As always, the main things that basically always work.. Talk to a doctor, eat healthy, exercise. People are always trying to get around that with other means. Keto has worked wonders for me... Mainly because I generally ate like crap and never get outside.