“they were the only righteous option”
Frankly I trust Eisenhower’s opinion on this matter more than you.
That's fine, now reason out how a blockade would work, even absent our continued air and naval attacks. Answer how our POWs survive, estimate the number of Jap dead before they are forced to the peace table, how much longer would the world have to wait before the stranglehold had its effect. You have a scenario across Sea of Japan similar to a blockaded Imperial Japan, where the military and the political leadership eats, the rest of the population not so much.
Look at the history of the war, learn to think rather than emote about the use of the bomb. I like Ike, I doubt he raised this issue in his run for the Presidency as he would have been crushed. I noted earlier that a blockade working was inevitable, but a war planner figures out the costs before planning or approving a Course of Action (COA). A blockade didn't meet the objectives unless the only objective was victory without a timetable.
“Frankly I trust Eisenhower’s opinion on this matter more than you.”
That could be a mistake. Eisenhower understood nothing of the Japanese. His opinion was based on the assumption that the Japanese were rational according to his standards of rationality. That assumption was false.