Factual error: When the Marines strip off and run into the sea in the final scene, Doc takes off a pair of white socks that would be more appropriate for a final at Wimbledon. Not only are they white rather than khaki, they are virtually spotlessly clean which would be impossible after a week of fighting on the black sands of Iwo Jima.
Factual error: The water is perfectly still around the ships as they bombard the island. When the cannons fires there are small ripples on the water from the shockwave, but around the ship it remains perfectly calm.
Answer: It's hard to truly understand why some people aren't comfortable in the spotlight. But Hayes was known for saying "I am not a hero" and that the real heroes were "the brave men who died." He really didn't want to be known as a hero for raising the flag, especially when so many of his friends died and didn't earn the respect he was getting. Unfortunately, he turned to alcohol and developed a drinking problem, which lead him to shun fame even more. However, these things are not unique to him. Many soldiers, especially those who suffer PTSD, which Hayes may have had, feel guilt or remorse for surviving when friends didn't. Fame and the spotlight only exasperates these feelings as it becomes a constant reminder of their survival. Alcoholism also leads some to want to be left alone for numerous reasons.
Bishop73