As a type 1 diabetic, this isn’t remotely true for me. Novolog and its equivalents made timing impossible for peaks of insulin and food absorption. Also made low carb impossible due to the peak pattern of the insulin compared to digestion of low carb, high protein meals. Insulin pumps with combo boluses resulted in unpredictable absorption due to scar tissue from having low body fat percentage.

Ended up switching back to generic novolin R (regular) as injections which allows me to use different areas of the body, eat low carb, and dropped my a1c down 3 points. Reduced my standard deviation of blood sugars by about 45 as well.

Every diabetic is different though as others have found great success with novolog, insulin pumps, etc.

There isn't a generic insulin available (at least in the US) - that's why there's a movement of biohackers to homebrew insulin.