As someone who married a diabetic, I guess I’d have some opinion…
The night he told me (on a date), a married sibling said they would say no without question. I called my rav and he said, “There are many diabetics and few bnei torah.”
I won’t lie and tell you it’s the easiest disease and well controlled. Sometimes it is and other times, it isn’t. There will be times (i.e. highs or lows) when they can’t function up to capacity. There are higher medical bills. Sometimes, you may be at a simcha or out or having fun where you will need to stop for supplies or mechanical failures of equipment or simple inability to concentrate.
But when asked would I do it again? Without a second thought.