Aircraft cannot invade and occupy ground. So I fail to see how F6Fs will defeat Japan without USMC and U.S. Army participation.
You have the benefit of hindsight.
In mid 1945 this was not the view of many senior US commanders. A plan with much support, still not abandoned by the time the Interim Committee tendered its report on the use of the atomic bomb on the 1st June ('45), was rather to strangle Japan with a ring of bases and intensive bombardment.
Combined with a tight naval blockade, such a course would, many believed, produce the same results as an invasion and at far less cost in lives.
"I was unable to see any justification," Admiral Leahy later wrote,
"for an invasion of an already thoroughly defeated Japan. I feared the cost would be enormous in both lives and treasure." Admiral King and other senior naval officers agreed. To them it had always seemed, in King's words,
"that the defeat of Japan could be accomplished by sea and air power alone, without the necessity of actual invasion of the Japanese home islands by ground troops."
The plans for the invasion of the Japanese home islands called for an assault against Kyushu (OLYMPIC) on the 1st November 1945, and against Honshu (CORONET) five months later. Though the Joint Chiefs had accepted the invasion concept as the basis for preparations, and had issued a directive for the Kyushu assault on the 25th of May, it was well understood that the final decision was yet to be made.
MacArthur was the main proponent of an invasion. Reliance upon bombing alone, MacArthur asserted, was still an unproved formula for success, as was evidenced by the bomber offensive against Germany. The seizure of a ring of bases around Japan would disperse Allied forces even more than they already were, and if an attempt was made to seize positions on the China coast might very well lead to long and drawn out operations on the Asian mainland. He was correct about the bombing and at this time Soviet intentions on mainland Asia were not clear.
It was General Marshall who presented the plan for the invasion at a meeting at the White House on the 19th of June. He carried the meeting with him, though both Admirals Leahy and King later stated that they did not favour the plan.
Trumann agreed the following program.
1. Air bombardment and blockade of Japan from bases in Okinawa, Iwo Jima, the Marianas, and the Philippines.
2. Assault of Kyushu on 1 November 1945, and intensification of blockade and air bombardment.
3. Invasion of the industrial heart of Japan through the Tokyo Plain in central Honshu, tentative target date 1 March 1946.
Of course this was all rendered irrelevant by the success of the Trinity test a month later and the decision to use the weaponised version of the device against Japan
These were the views and decisions taken by the men in power
at the time and without the benefit of nearly seventy years of hindsight.
Cheers
Steve