Exactly WHY each of us discovers the need to limit carbohydrates in our diets dictates the WHAT, WHEN, WHERE and HOW....
Treating all low-carbers as a single demographic oversimplifies diet, and it's oversimplification which is the "enemy" in diet as in so many other things.
Most low-carbers are probably in it for the weight-control, but there are VERY many other kinds. Diabetics reduce their blood-sugar and glycation issues through smoothing out the glucose roller-coaster and minimizing side-effect-laden pharmaceuticals. People with neurological issues, from Alzheimers to migraines to excitotoxicity to epilepsy, find amelioration with ketogenic-level carb restriction. Even high-level endurance athletes court a ketone- or FFA-based metabolism to improve their games.
I, a thyroid-borderline case with histamine issues, find LC very helpful to keep my system running smoothly, as well as using the paleo/ancestral version of LCHF to avoid problematic plant-based foods, and promote healthy aging. I'll be a [GASP] sexagenarian in less than half a year!!! ;-)
So what we should optimally EAT depends precisely on why we're "here." Do you primarily need to lose weight? Do you need to lower fasting blood-sugar or insulin? Do you have an autoimmune problem? Do you need your brain to run on ketones more than on glucose? Do you need to eliminate gluten and simultaneously pursue a controlled-carb weight-control diet? Do you have children whom you'd like to get off to the best possible nutritional start in life? WHAT?
Define your problem, if you haven't determined your perfect diet already. Find a similar person who writes online, with a similar problem. Start with what works for them, and refine it to meet your own specific requirements.
Once you define what makes you feel GREAT and conversely, what makes you feel like hell, it's significantly easier to ADHERE to your ideal diet. I tell ya, if my knee didn't give me problems when i eat whole grains, or if my gut didn't bloat with the wrong vegetation in it, or if my energy didn't tank when i indulge in certain foods, it would be MUCH harder to avoid an obesigenic diet!