It wouldn’t have necessarily helped. We didn’t take out the German shore guns, we didn’t have anything that could bull through the tank traps.
It’s been strongly argued by several people that the naval pre-landing bombardment plan was botched by Bradley at Omaha Beach.
The USAR in Europe was strongly colored by amphibious ideas emphasizing “surprise” leading to rather short and ineffectual bombardments. If you compare the total number and tonnage of pre-landing shells fired at Omaha to various Pacific Islands, there’s not even the remotest comparison.
One unfortunate aspect of “Saving Private Ryan” is that the important fact that the Omaha landing was saved by US Destroyers almost running aground coming in close and blazing away with direct fire with 5 in. guns, is completely ignored.
Recommend reading the “Blitzkrieg Myth” and other books by Mosier on WWI and WWII for an fresh view of those wars. I did not agree with everything Mosier opined, but he did change my mind on Monty’s value in WWII. Per Mosier, the Allies succeeded on D-Day because of Monty’s advice and changes to the original D-Day battle plan - which was based on his past victories fighting the German Army.