Imagine a scammer changing your recent transaction history in your regular banking app.
The history was not changed. A new entry was added to it. Everything that happened before is still there.
I copy paste previous receivers regularly because I trust that the history was not changed.
Bitcoin and crypto is not the same as your online bank. And if you blindly copy transaction data from your bank app's history, such a thing could happen to you with your online bank as well. If I sent you $0.01, and my transaction was the most recent one in your history, and you copy my bank details and send me $1000 instead of to your brother without checking any of the details, whose fault is that if not yours? Do things properly and you wont have to face any consequences. With traditional banking you can revert your mistakes, with bitcoin you can't. It's not a weakness, it's an integral feature.
But scammers being able to change the transaction history in an official app goes very far, in my opinion.
No matter how many times you repeat it, the transaction history wasn't changed. It got updated to show the most recent activity. No one altered your old history to point to other addresses. And even if they did, it wouldn't matter if you used it properly.
I'm not very tech savvy, that is true. But I'm not some dumbass.
I hope you aren't for your own sake. Don't copy transaction info from transaction histories and blockchain explorers. There is a right and wrong way to do it. Whoever got affected by poisoning scams did it wrongly. It's that simple really.