You will see articles that their thumbnails cut in the wrong place.
Right place? This is subjective and would vary from image to image. WordPress can’t tell which is the “right” place for you. You can try switching to the other thumbnail size 150×150 to see if that’s what you’re looking for. You could also try to change the dimensions on WP-Admin -> Settings -> Media ( You will have to regenerate thumbnails after changes ). You can also try to manually edit each thumbnail on Media Library -> Edit -> Edit Image but I don’t recommend this.