Just for a moment, let's consider the fingerprint scanner from another point of view, to be realistic.
1: You make a phone, and some people like your brand, for whatever reason. Happy customers that like your product. All good.
2: A competitor brings out a phone with a new feature, in this case a finger print scanner, but could be anything.
3: Your current customers don't have this feature as your current model does not offer it.
4: Perhaps this is something your customers would like, but they still wish to stay with your brand, and of course, you wish to offer your customers things they would like to make them happy.
5: You decide your next model will have this new feature, functionally similar to please your customers.
Just what on earth is wrong with this?
It is what any company may do for it's customers.
That would be like Ford fitting a radio to a car, then Vauxhall saying, sorry folks, we know you would love a radio in our next car, but we feel we would be copying ford if we fitted one, so we'll leave that out.
That's crazy, you would not do it. You would ass features customers liked or wanted, and if someone else with a similar product brings out some new addition that proved successful then of course you would wish to give YOUR customers something similar.
It seems crazy than anyone who liked Apple, to think anyone would do otherwise.