I get where you're coming from, but I would make the precise same arguments whatever his contract situation in the past, present, or the future.Fair comment but it's easy when you're working with someone else's money... do you think Raheem has done anything over the past 18 months or so to justify a new improved contract?
Unlike the others you've named, his form almost literally fell off a cliff. Unlike the others, it wasn't injuries or a few 'in and out' games, he went from an 8.5/10 player to a 5 or 6/10 almost overnight. His performance on Tuesday did nothing to suggest that he's anywhere near turning a corner, and I certainly don't think anyone would expect to see him starting at Anfield on Sunday.
While the club may well choose to be patient with him, I can't honestly believe that anyone at the top level at City would actually want to offer him a 5 year contract on increased wages.
It's heading towards him walking away for free at the end of his contract - If the club think that is likely, I can see no reason why they wouldn't aim to offload him asap, regardless of how much faith Pep has in him. The problem (for all parties) is always going to be meeting his wage expectations.
And all the arguments against Sterling staying beyond that are nothing different to what I had read for multiple seasons about Gundogan or Stones. I strongly believe that there's nothing particular unique about the Sterling situation right now.