Farming plots on a fork without key hazard

[JakubSido]

I am trying to find some more detailed information about the role of NFT Pool Singleton and its relationship with other keys in the whole chia system. I can not understand why should be sharing the mnemonic seed phrase mandatory to use plots on another fork of chia.

Which private keys are theoretically needed to farm on another chain?

Is there a possibility of creating an NFT singleton on a forked chain from another wallet, but with the same launcher_id; to be able to farm with plots connected to the launcher_id but use a different wallet to create NFT and for payouts.

I am scared... if I share my seed phrase and it leaks, even if I use a cold wallet for payouts. Even if my XCH is safe, an attacker can potentially manipulate my NFT singleton.

Is it possible to create keys_A and NFT Singleton with it; keys_B; and then create plots with pool contract address from NFT(key_A) and farmer key(keys_B). Then use the keys_B seed phrase and share it with some chia fork to not allow manipulate attacker with the singleton?

Is there any other way how to farm some fork without any key hazard?
I believe it is a more theoretical question about chia itself, so I ask here, not the forks.

I really tried to find it... maybe you can give some advice on where to search.