I'm kinda talking outside my knowledge, but...
Both my parents were insulin dependent T2. I was diagnosed a few years ago, but have avoided so far having insulin dependence.
I have asked my dr several times about at least having some insulin around for emergency use (like when my morning sugars were just going nuts through morning effect). Part of my logic is that maybe my beta cells could use a rest or a little help now and then.
He looked at me and said, I have never seen someone actually ask to go on insulin and that was the end of the conversation about it. It's not like I want to be on insulin - I don't fear it, but I am willing to be in control of my diabetes, rather than it control me.