I disagree. I've been part of these kinds of procedures. If they go to gi, you give them a whiff of basically anything and they code. I've had patients just crash after being given a drop of prop. Then they get intubated, lined, tons of pressors, gi scopes and there's too much bleeding to see anything and you can't get source control if you can't find the source.
Then these guys go to icu if IR says no or to IR and you're basically emptying the blood bank for a guy who will officially "die" after a week of wasted resources in ICU. If by chance you happen to get to the point where they miraculously walk out of the hospital, they will go home, drink again, bleed again and the same thing will happen a few weeks later. The long term prognosis is horrible for this self inflicted, irreversible illness. It's better to say no from the beginning.