Life could be short and mean and you had to deal with that. To rule Rome you had to be ruthless and deadly, and feel little guilt about it.
These days stoicism is rebranded in a way I find very unhealthy. It’s a thinly veiled excuse for self centered sociopathy rather than an embrace of the natural rhythms of the world and what is in and not in your control. It has become either an excuse to give up one’s individuality in a system or to imagine it empowers you in some “sigma” way to conquer it.
I wish more people would study it in its context, a philosophy for a cruel and bitter world — something many of us do not live in today.