I always find it really bizarre when posters make out like this is the bar set for people's expectations of step parents and tbh, other than certain scenarios (say met child when a baby and mum isn't around), I tend not to really believe people when they gush about how they love their SC exactly like their own.
I like my SC, they are good kids. But it is absolutely no comparison whatsoever to how I feel about my own DC and I honestly don't see how it ever could be.
I actually find it really annoying when people suggest SPs should love their SC and there is something wrong if they don't. Why? So long as they are nice and kind and welcoming why does this intense love have to factor into it. Because let's be honest, it isn't really natural to unconditionally love children that aren't our own (and I'm not talking about adopted children before anyone says it, that is a very different scenario).