A little different view of mine:
If you eat pizza all the day with a big coke and your by is worst, yes there is something wro... You could improve your diabetes handling. And LCHF / complete lifestyle change can be an option.
But there are other ways, too. I am on insulin since my first day...
I have an insulinx. What I like: needs not much blood. Bolus calculator. Light.
What I would improve: more finely graduated steps than just 0.5 for IE/BE, more different time zones for this
And - there is no need to test the blood when eating and using extra insulin one hour after last usage -...
My question was about the statement "insulin is toxic to the cells". I found interesting theses, but no medical explanation. Toxic means "doing something biological harm to it". What is the damage which insulin makes to the cells? Without this, it is a thesis. Probably worth to make research on...
There are several possible explanations. Shame. Or the feeling using a test stripe is more about having a test you can pass or fail instead of monitoring/metering.