Someone my friend knows was telling him about her type 1 diabetes and she said she's learnt to carb count and she's been told she can eat and drink anything she wants as long as she takes the right amount of insulin. So she will just drink full fat fizzy pop like Pepsi and Coca Cola 24/7. Surely that's harmful and she's been told wrong info?
I'm not a T1, so only commenting from what I feel to be a common sense viewpoint.
I'm sure what she says is factually correct, but it would seem to me to be a very hard way to grasp and maintain control, not to mention if she is consuming large quantities of empty calories, such a full sugar Coke, she could be susceptible to weight gain.
My take on dealing with my own brand of diabetes has been to try to treat my body kindly. I modify my diet to create softer peaks, meaning my body needs to work less hard to bring my sugars back down. It has worked for me so far.
I completely appreciate that for a T1, not producing insulin yourself, this isn't weholly applicable, but the essence applies. Intake fewer carbs (including full sugar fizzies) means the numbers don't go so high, meaning less insulin to inject. The less insulin needing to be injected, translates, to me at least, into the less chance there is of miscounting the required dosages.
That's my take. Clearly in a hypo situation, requirements seem to differ quite a bit.
If I were you? I wouldn't be following this person's example.
Good luck with it all.