Since Robotnik didn't provide a full answer...
No, you should not be rejecting these edits. The minecraft tag is useful to these questions because our default tagging scheme is to tag a question with the game. Minecraft is that game, so there is no reason for that tag to not be there. (Mea culpa, there is at least one instance (mentioned above) where I didn't include the base Minecraft tag.)
In addition to Robotnik's suggestion that those who ignore minecraft would probably also ignore minecraft-commands and minecraft-redstone (let's forget for a moment that this can be accomplished by ignoring
minecraft*), some users might find it beneficial to favorite minecraft while ignoring minecraft-commands, since they have no interest or experience in command blocking. In general, the logical conclusion that you should draw from this argument is to not tag those questions with the base Minecraft tag; however, the interaction between favorite and ignored tags means that it'll still be obvious to the user that this is a question that they're not interested in, and no harm is done by having the multiple tags.
Now, on to the issue I brought up, which is suggested edits that remove a Minecraft sub tag (or any other sub tag that exists) that should be there. These edits should, at the very least, be improved to undo the harm being done by the removal of the tag, or rejected in order to send a clear message to the suggester that what they've done is wrong and reapplied with the correct tags. It is unclear to me how the reviewers allowed this to happen, other than the possibility that they didn't know that minecraft-commands also encompassed command blocks (although that is in the wiki excerpt).