IMHO its quite became a sensation
Sakura's statement is quite shocking for a H!P idol
H!P idol dont have a personal SNS, so fans dont really know what's on their daily mind
as for her statement
my take is, all 80's great idols have beauty and singing as their weapons, and people loves and think highly of them for that
but now is a different
even if you have amazing vocal, dont guarantee your place in the idoling world
because the world is now a very different world than the 80's, idols can "sell" anything than only her voice and good looks
i mean ex Dream5 Ohara Yuuno doing gravure so instensively back then, people loves it and now she reap the reward of being an actress
also i dont recall Sashihara Rino being the classic beauty idol, her voice is also sucks, but damn she makes it up with her brain and personality, being a great tarento presence and now a renowned producer of a two succesfull idolgroup
if you can sing, thats good
but if you dont, try sell something else
thats idol IMHO