Just curious as to when you formed this opinion of dota . After a few uses BKB duration comes down to 5 seconds , which is nothing , and supports can use defensive skills and items like force staffpushes youally away from the carry , ghost scepteryou cannot take physical damage , euls scepterspins you in a tornado for 2 . 5 seconds , you ' re invulnerable but can ' t move and glimmer capetemporary invis and magic resist to youally to kite the carry . Also BKB gives negligible damage and stats for such an expensive item , so people don ' t buy it unless they have tolot of disables on the other team . How is it bad if roles aren ' t clear ? Some heroesnot all can be played in multiple roles by varying the skill build item build , but it ' s almost always better to play the said hero in the one role that is generally stronger than the others . But roles being unclear can throw off the enemy or keep them guessing , which is so much better while drafting . Also I ' m pretty sure you ' ve never played Dota , because carries are not 10 times easier in Dota by any means .