Yes i agree . Bitcoin fee is so much,now that the bitcoin price is high the fees are also high. So instead of using bitcoin as a transaction they coverted it to altcoin so that it may cost low fee and probably transact better. If you are btc holder it is okay for you because you tend only to hold and wait for price rise up
maybe it is a factor when the price of Bitcoin increases, some altcoins can follow behind it. due to the problem of high transaction fees in Bitcoin, many people convert to Altcoins in advance to reduce transaction fees