That is because nobody cares about altcoins at all. They all want to make profit from trading altcoins, in fact majority of people in crypto space don't even own any altcoins! They have custodial accounts that may hold some coins on their behalf (ie holding on exchanges) so that they can dump it at a moment's notice.
They don't provide any utility either so nobody cares if the coin is insecure or its blockchain mutable, they care about how much pump and dump is going to happen.