Thank you, I think it’s just realistic 🤷‍♂️. Here is how i imagine their thought process:

My guess is they’ve done their homework, learned of the block size wars, and thought “if this happens again, where someone claims a random fork is the ‘real’ bitcoin, these people may try to sue us saying we are making false representations with our BTC ETF because it isn’t the real bitcoin, according to them. So we should shield ourselves from that and say, if something like this happens again, we are going to have final say over which one is real for purposes of the ETF, so that they cannot claim we are misrepresenting anything.”

And my guess is they would continue supporting the strongest and most valuable one (the only real one) - BTC.

Side note: if Blackrock made their own fork it’d probably be a security.