While I don't consider this a serious proposal, these are my thoughts on how totalitarianism could have beneficial social effects in the right situations. It's purely a devil's advocate argument.
Everyone is treated as equal and human under the law, but obviously people aren't equal in terms of other qualities. As an example, the type of people who identify as "incels" are obviously defective in most if not all redeeming human traits. Whether this is a product of bad genetics, bad environment, bad character, or a combination of multiple factors, I'm not sure, and it is probably multifaceted.
But, regardless, I don't see any redeeming value in allowing such individuals to exist in society even if they haven't actually committed a crime, and I feel like the merciful thing to do would be to simply disallow them to exist as they currently do. If I had the authority, I would be tempted to simply have them executed, or at least have all of their human rights removed and them reduced to the status of second-class citizens, possibly allowing for them to perform forced labor. This would all be done legally and on the books, no one would be committing any vigilante violence against incels, white supremacists, and the like. They would simply de-classified as human altogether, and legally it wouldn't be any different than putting rabid animals to sleep.
So while totalitarianism ultimately would do social harm than good, I can see it having social utility in a scenario like this. The subhuman state of existence that some individuals reside in simply isn't something a better human would consider worth living, so if society was slightly less liberal in their application of the definition of "human rights", it might make the world a cleaner place, provided that it was able to only be applied in scenarios like this (e.x. exterminating incels, white supremacists, and other undesirables), rather than in the whole context of society.