Alt coins being paired to stable coins rather than BTC on CEXs

Last few alt coins that I bought (YLDY, FLOW…) from exchanges did not have a BTC pair, only USD pegged stable coin pair. Also lots of people use DEXes now and coins are usually paired to the native currency of the DEX (UNI, CAKE, SUSHI…)

The narrative goes that Bitcoin is the big daddy, the market mover and the first step for all new comers to the crypto world. Hence why it has value and dictates the market's direction.

If most alt coins on exchanges are bought with USDT or USDC or some other stable coin, and most exchanges decide to pair cryptocurrencies to stable coins (makes sense in my opinion). Doesn't that mean that we will have independently moving cryptocurrencies like what we have in the stock market? not a clown show that goes up or down on the whim of a celebrity tweeting about Bitcoin. And if that's the case why aren't exchanges already doing this?