they didn't use a table because they sucked at developping, they used it after generating it from browsing all item id and collecting useful data in a tool they made themselves probably. Then they copied the table.

Why?
because if you run the game on a toaster and do such a browsing at startup, you crash.
so yes it is possible.
and no, it's not worth the processing to avoid to copy paste your resulting table twice a year for major updates.