It's like this wasn't talked about since the days of satoshi. If the miners become hostile, we do a proof of work change so save it. It's so strange people aren't able to wrap their head around it

I stand corrected here. Maybe that wasn't discussed till 2015 era

because those people didn't talk about it. they dont use bitcoin, they buy and sell paper bitcoin

It doesn't matter who forked off where. A hard fork that changes the PoW algorithm is the unfortunate outcome of what began as a proposal for a TEMPORARY soft fork.