Warning--long post--read at your own risk.
I wouldn't call it a huge importance--like I said before, people have made different claims about RP's views and I'm mildly curious as to what they actually are. Now you're offering a differing view than what Danny provided about Ray Peat on carbs, so the question is apparently still an open one, as I still haven’t seen anything from Ray Peat directly and specifically on this. Maybe Danny could provide a source and respond to your claim, if he reads this thread again. It's interesting how divergent the opinions are on what Ray Peat's views are.
I haven’t been diagnosed as diabetic, but for years (going back before I started raw Paleo and even before cooked Paleo) I've gotten big BG spikes and certain negative effects after eating certain carby foods, including reportedly healthy raw Paleo ones (though my fasting morning BG was always termed "fine" by physicians, actually lower than average, so the physicians never investigated it and I was unaware of the alleged harm that could be done by BG spikes and lows and for many years was eating a relatively standard diet that included too many everday carbs for me to get a clear picture, except mainly in retrospect).
Several bloggers, including some that are healthcare practitioners, have suggested that this could be due to insulin resistance or other malfunction from many years of SAD and other factors and that it might be fixed by increasing carb intake, doing more weightlifting, eating probiotic foods, etc., which I have been experimenting with for some months now with a small amount of improvement in my BG spikes and carby food tolerance (though it's hard to tell what might have occurred just via raw Paleo alone). Interestingly, the single biggest help along these lines seems to have been raw fermented honey, which sort of falls in line with some of what Ray Peat says, though not specifically raw fermented honey so much as other "sugary" foods. Which brings to mind another question--does Ray Peat discuss "probiotic" foods or the Old Friends Hypothesis at all?
It makes sense to me to try to further repair any underlying problems that may be contributing to my remaining carb intolerance, rather than just coddle the problem by severely restricting carby food intake. Maybe I'm being overoptimistic in hoping for additional improvement, but so far it's looking encouraging.
There’s quite a debate raging online about whether one should try to improve insulin sensitivity via “safe starches” (certain cooked tubers and/or grains that Paul Jaminet, Kurt Harris, Richard Nikoley, Anthony Colpo and others recommend, IIRC) vs. more “sugary” foods that Ray Peat, Danny Roddy and many here appear to recommend, if I understand correctly. So it is relevant info for me and I've been exploring and experimenting with both sides of the coin. How important it all actually turns out to be for me only time will tell.
I suppose my goal is to try to get to a point like where Lex is, where I can sort of just "set it and forget it" when it comes to diet/lifestyle/health and focus more on other things. At various stages I've guessed that no more improvement would be possible, only to be pleasantly surprised later when I tried something else (not always dietary), that helped further and sometimes achieved results I didn't think possible.
If none of this is relevant to you, that's fine, I'm not claiming it's relevant to anyone else. I try to avoid giving the impression of prescribing to others and people are free to ignore my posts if they’re not interesting.