Bombers were USED as -second choice- Scouts and Patrol craft when SEA PLANES WERE NOT AVAILABLE ... generally they lacked the special equipment (like RDF) and TRAINED OBSERVATION CREWS the catalinas had ... Aside from THAT their use was as ASW & Convoy Escorts ... Just because it has WINGS your 109 is NOT going to get the Storch's Observation advantages and your B-24 doesn't qualify as an OBSERVATION plane. DUH ?

Where are you getting this information from? wikipedia?
Bombers were one of the VERY few with the range to do scouting and patrol. Some excelled in the role like the b-24 which maritime version flew almost twice as far due to more gas and no bombs. Here's a hint - nobody that entered WW2 on the american side had experience, it was gained through war. It wasn't until late 1943 that american's started spitting out experienced pilots due to Aces and veterans coming home to train. And if you want to look at it more closely, Americans produced twice the number of pilots then the Japanese did in 1942 - and neither had any training setup period. Everything was trial and error, eventually pilots got experienced and so did crews. If you want to look at it from a broad point of view - the Japanese never understood ingenuity as the american's did, one reason American B-24s were used by the navy for naval scouting and recon work, where Japanese Betty's were classified as "bombers" and other types were for recon.
Look at the F-5 Lightning, it was an unarmed version of the P-38, and it did wonders in the pacific and ETO, and the pilots were not exactly "observation" specialist either.
Even if they were experienced think about this: The japanese were the most advanced naval aviators in the outbreak of WW2, far more skilled then the Americans or probably every country combined.
During the Battle of the Coral Sea, the Japanese launched an attack on what it thought was a carrier and her escort (which happens to be an AO or fleet oiler and a destroyer). How could the most experienced pilots in the world mistake an oil tanker for a carrier and a destroyer for her escorts? They were trained far rigerously on identification - and proven once again when Japanese planes attempted to land on american carriers!