Depends on your personality. If you’re the type who’s information driven, testing is motivational and can help decide what changes need to be made. If you’re the type who gets stressed by information, testing is counter productive. If you’re one who takes a laissez-faire, the body will figure it out approach, testing is unnecessary.
I approach my health journey the same way I do a road trip. I figure out where I am. Plan a course to get to the destination. Start driving, continously checking my route with the map. Rerouting as necessary in response to situations that I encounter.
I have health goals (metabolism, body composition, cognitive function). I know my starting and desired targets. I created a plan to achieve them. Not tracking the variables associated with them would be like driving blindfolded.
I measure ketones everyday. I measure glucose even more frequently. Dr Pompa says that high BG can prevent the body from using ketones as fuel. I dunno if that’s correct or not. What I’ve experienced is that glucose correlates more closely to weight loss than ketone levels. Maybe that’s because it more closely reflects insulin levels. I dunno. I don’t need to understand the mechanism to apply the concept. But I needed to track in order to discover it.