If it's enough for you to move on then that's fine. Me...I believe anyone can be fooled and that's exactly what was done to Mary Jane. She was manipulated to believe that baby May was dead.
ASM #441 has mj confirm it died inside her and was thus stillborn. Thats all I need to move on.
No body basically proves that the character never died to begin with. I don't accept the death of April Parker from the Spider-Girl comic either because there was no body to confirm it.Could they bring her back if they wanted to... sure.... its a comic: "No body, no confirmed death" is meaningless because we have heroes where we had the confirmed body and they still come back.
If she re-appeared in a comic everyone would just accept the fact that she didn't die to begin with because a body was never found. As a result her return from supposed death wouldn't even need to be explained...and if OMD never happened and baby May suddenly made an appearance in a comic her supposed return from the dead wouldn't have to be explained either because there was no body confirming her death.
It's a lot easier for a writer to bring a character back from the dead if there is no body. No explanation is necessary because with no body found the character never died to begin with.