I do not know why some people can be manipulated in a way they will be required to fill in their seed phrase and they would, I noticed when generating a wallet, there was an instruction that the seed phrase should not be revealed to anyone because it can be used to hijack the wallet from the real owner. If it is called recovery phrase and it is used for recovering back your wallet, how should the person reveal it to any site, if the site is fake or not, only when recovery phrase known as seed phrase is needed is when you want to recover back a wallet, not any other time because any other time is scam.
Because those people desperately needed help, so scammers are playing with their emotions. So if their decision is clouded, they can easily fall for this trap and just fill in all the information in the google docs document and then sit and wait for the reply.
Until suddenly they realised their mistakes, and it's too late because they have given the criminals the access to their wallet.