Regarding the whail death not long ago and fake transactions

If the miners decided (51% of them at least) that having such a big amount of money lost forever is not good for whatever reason, couldn't they just create a fake transaction where this whale 'transfers' all his/her/whatever money into other (active) account? You don't need the privste address to do that, do you?

Is the only thing stopping them the fact that such a manipulation would destroy public confidence on the coin itself or is there something more?

Edit: This is the event that triggers this comment

https://www.marketwatch.com/story/one-of-the-largest-owners-of-bitcoin-who-reportedly-held-as-much-as-1-billion-is-dead-at-41-reports-11624904721

Yep, whail meant to be whale. My b.