If everything that BTC does, LTC does faster and cheaper, why BTC is worth more ?

If I understand well, LTC has the same code base of BTC, but allows GPU mining, faster confirmation (every 2.5 there is a new block), cheaper transactions fees and supports all the inovations that are coming to BTC, like Atomic Swaps and Lightning Network.

So, I think that there is some arguments of why BTC doesn't adopt the same modifications in its code. Does someone know the trade-offs involved in BTC and LTC ?