Then maybe you can explain Matthew 28:17 which reads:
"When they saw him, they worshiped him; but some doubted. "
Exactly: Who wouldn’t doubt to see a dead man alive? It was the “eating” that made the doubts vanish.
Thomas doubted, but was later convinced.
According to the USCCB site: [17] But they doubted: the Greek can also be translated, "but some doubted." The verb occurs elsewhere in the New Testament only in Matthew 14:31 where it is associated with Peter's being of "little faith." For the meaning of that designation, see the note on Matthew 6:30 [30 18 If God so clothes the grass of the field, which grows today and is thrown into the oven tomorrow, will he not much more provide for you, O you of little faith?].
Sometimes the obvious is simply staring us in the face. Like the disciples who went away when our Lord said that they would have to "eat His flesh and drink His blood", they felt this was too difficult to accept. Oftentimes I reflect on what life was like back then and how exciting it must have been to be a disciple of Jesus but then I recognize that many of His followers were simple men, drawn to His words but weak when it came time to accept some of His preaching and actions. We still see this today.