Bitcoin is great, but it's not a one-stop-shop to solve every problem in the world. ETH is a better choice for smart contracts, XRP is a better choice for fast payments, etc etc. I love Bitcoin, but it's not like there's no room for other coins offering different functionality A coin that is targeted towards one solution will likely perform it better than something that tries to solve everything at the same time.
I know , some of these bitcoin maximalists are going overboard and declaring everything that isn't bitcoin to be a scam. They like to forget about those 1 million coins by satoshi that are essentially a premine. There is room for multiple currencies to grow and the communities shouldn't be battling against each other.