People are using bitcoin as investment so they are going to compare with other cryotos wehen the price increases and decreases,we can't do anything much about it until more people know what is bitcoin.
It's not surprising that when a newcomer begins to understand and trade crypto, it will find that most of the exchanges use Bitcoin as the medium of trading, so they not only have to follow the price of altcoins, but also follow bitcoin, so it's normal for them to compare altcoins with bitcoin, at least most newcomers will do this until they really understand crypto.