Most of those disabled witnesses were voted a long time ago and their supporters don't seem to care about updating their votes to support more active witnesses.

Either that or they are not presented with witnesses that will uphold the most basic principles of blockchain governance. How hard is it to not support stealing? Apparently on steem it's very hard as you yourself can attain to.

what we can do is voting more witnesses to the top that are running the current Steem version (0.23.1).

Either that, or you could present a hardfork that people actually agree with. Currently, all steem governance is set by one entity which continues to control the blockchain in a centralized fashion. So there really is nothing you can do fix this.