What would people understand for powerful? When i say most powerful i mean the best (at least thats how i see it) but i did not use that word since is kinda overused.
Well some vocalists that are the best are not considered "powerful
For example, SNSD Taeyeon is not considered a "powerhouse" vocal but she's still among the best.
For me, powerful sort of means that they can pull of belting, high notes the best and have a stronger and "louder" (lol) voice and usually higher range
V is the best for technique in BTS but imo because of his deep voice, he wouldn't pull of that sort of high note that Jungkook or even Jimin would do. So he wouldn't be considered "powerful" because his voice isn't like that even if his technique is the best
I think people may interpret powerful as different from the best, but that could be just me