The things that you're saying are just the consequences of overeating in general though. If a non diabetic eats too much food, they'll see a growth of adipose tissue, and this can lead to hypertension and heart disease.

Unlike non-diabetics, if a type 1 diabetic overeats without taking 'exogenous' insulin, they will not gain weight, and there's no risk of a growth of adipose tissue. (There are, however, significant other risks, including death.) However, if they take insulin for the food they ate, they'll see the risk of weight gain and excess fat that non diabetics would see from overeating.

So you may be arguing that there are health risks to overeating. And this is true, but it's not specific to type 1 diabetics.

>Having all of that extra exogenous insulin

For type 1 diabetics, all insulin is exogenous. It's not "extra", it's simply insulin.