I really like your mindset. For me 1 BTC is just 1 BTC. No need to consider its $ price.
In that case, would you pay 1 BTC for a couple of pizzas since you think its just 1 BTC worth? OP is setting focus on a completely different page while you are making no sense with your words.
But keep in mind many people are here just for speculative purposes and don't care about blockchain technology, Bitcoin and so on. They think to cryptocoins just as a good way to make some dollars buying it and then sell it at a higher price. That's why people look so concerned about USD price.
The entire crypto market is based on converting token prices to USD, buying at a depreciation and waiting for it to rise. Blockchain has nothing to do with trading except for the fact that it is the platform that is acting as a ledger for all the transactions. Hence, for obvious reasons, traders would be least bothered about blockchain technology and only focus on USD conversion values of their coin investments.