That is because we constantly hear time and time again, especially around here, that when Apple does something they do it right. They don't do half-baked like other companies. This is mostly a justification excuse given when they are implementing something Samsung or Google on has had for years already. So if that is the case, should it not apply to everything they do?
I'd agree that recently Apple has had problems with services on release day. But those problems are always fixed. iCloud and iCloud photo library, even Apple Music (for me) work nearly flawlessly now. However whats happening now is the opposite; people are giving all the plaudits to Google before they've even released a product, we have no idea what Google Home will be like in a real life scenario, if it were Apple no one would give them that leeway. I'm not saying Apple don't have areas they need to catch up in, all I'm saying is lets not write them off based on an idealised Google product demo.