It takes time to handle all reported posts and make final decision to nuke or not nuke that user. Moderator who were received or will be received your reports will have to spend some amount of time to look at that account. Nuking one user is a serious thing to do, so when decision is made, it should be a right one.
I don't know that there is option to revert nuke decision - unnuke ?, like what we have with perma-bans, so if there is no unnuke process, it is definitely require moderators to carefully handle such cases.
Should I report all 524 posts?
You can, but I don't think you should do this because moderator will receive 524 reports from you, for a single case. It's annoying. There is benefit for you, increases for your report counts but for moderators it is annoying.