Pride can be a good thing, if you have earned it and you are good enough to deserve it, then you should be proud of yourself and it's a healthy thing.
But false pride or undeserved pride is harmful or even dangerous. Like look at those "fat acceptance" women who weigh 600 pounds and are pretending that they are the most beautiful people ever, they are pretending they are healthy, they are so full of this false and undeserved pride. They think they are so perfect already and don't need to change anything. Until they get their legs cut off by diabetes, or have strokes and heart failures, all while being a young person who should never have any problems like that. But they are so unhealthy that they make these problems.
When if instead they just became healthy and skinny, then they would have something to really be proud of. They would be as attractive and healthy as they like to delusionally pretend to be, they wouldn't have all those health problems, and they would have everything they ever wanted. But their false undeserved pride is their worst enemy.