Some things like movement speed just end up being more useful in the long run, even to pros. Just because an item isn't picked up doesn't make it inherently horrid at anything as well, it could just be 1% worse than the next best thing - which is usually the case with anything meta.
Some pros obviously picked it up Madrazors as well, that statement is false.
And Warmog's has only started to be a problem in Season 3, in Season 2 it was much more common to stack resistances on tanks - generally making Last Whisper the counter-item of the times. So I'm not sure what you're trying to get at with that bit. Madred's would likely see more play now than before, just due to the shifting dynamics of building survivability in the meta - like I said, the meta generally isn't determined by dramatic differences, it's usually just slightly more reliable than the next best thing.