You forget that often, the people doing this have little experience.Sometimes, on this board, people will say they bought some item and they want to know if it's any good. So then they ask people here and describe the item in words ("it was made in Italy from such-and-such leather, it has this type of stitching here, or this type of hardware here ... is this good? I paid X").
But, like, if you have the item in front of you, why don't you just put it on and see how it feels and looks? It should be obvious to you if the item is good.
There's a well known trope in development which is the "ninja developer" - he "crushes it" and produces 10x more code than anybody else, knocks out features, etc. He also tends to get promoted out before maintenance becomes a problem... which is where experienced developers and managers would say hey, that guy is not a ninja, he's a liability to the company (it's a long debate and a case can be made either way depending on context).
Point is someone who has just started as a product manager, or entered a larger company, is now faced with output from a number of developers and it is a perfectly legitimate question to go up to the more experienced tech folks he knows and say "hey, here's what I'm seeing, what do you think?" and get the unknowns unknowns. Quality manifests itself... to the expert.