First, most Shindan test winners were not picked for MM, but a sore loser will never be picked. Otherwise, girls like Kudo Haruka or Oda Sakura used to be sore losers. They are not as popular as girls like Miyamoto Karin or Sasaki Rikako back then, but they're not losers.
Morning Musume's FIRST AND OLDEST point is picking up the people who lose a competition.
But I find it hilarious that ya'll introduce fan-imagined rules ALONGSIDE the relevant counter-examples.
Then try to persuade me that Kaga Kaede is also a loser. Don't make me laugh!
https://helloproject...sei/Annual_Test
That is so stupid that someone decided MM' can't have a test winner. Ironically, if your from Hokkaido Kenshussei, that rule goes out the window since Mei won her exam, if I'm not mistaken. They made a huge mistake not putting Mifu in MM'... IMAO.
I don't know if putting Mifu in MM will make her shine. If you put girls like Yofuu Runo or Ebata Kisaki into MM, I assure you they never have a chance to get any lines up to this point.
However, I think that putting her in J=J is a huge mistake. Line distributions for J=J favor members with higher seniority. No offense, but Matsunaga Riai and Ebata Kisaki will never have a chance to shine if KNTM is still in the group (she's one of the main trio vocalists so it's really stupid not to let her have lines), and right now Aarii, who was not promoted during 5-nin and 7-nin era, becomes the stepping stone, despite not being in Karin - KNTM - Sayubee group.
Right now besides the Ruru - Reirei - Aarii, there are Riai, Ichika and Eba-chan. Therefore, it's plausible to assume that Mifu's turn will be 5 years later.