"There was no guarantee the Huge Materia would work, not to mention the negative impacts it might have had on the Planet if it was loaded with all four HM's (even with NO Huge Materia, or a single one, the rocket's explosion was still powerful enough to make a hole in Meteor's outer shell).

Besides, Shinra intended to destroy Corel AGAIN (the railway passes right through it) and invade Fort Condor to get Huge Materia, not even caring about who was going to get hurt or killed in the process. That's the main problem with Shinra's plan, and that's why the party opposed it."

-Some guy from some other forum