Should booktube only be positive?

Should book reviewers only review books they liked, or is it useful to the community to have negative reviews, or even rants? Let me know your thoughts below!

Videos mentioned
Jenny Nicholson: https://www.youtube.com/watch?v=yZMt87ZdUbw
Liene's Library: https://www.youtube.com/watch?v=ChlslskxhC4&t=1241s
The Contradictorian: https://www.youtube.com/watch?v=aMb0YU4Rp_8

Socials
Instagram: https://www.instagram.com/bookborn.reviews/
Amazon wishlist: https://www.amazon.com/hz/wishlist/ls/2CK6S6SHB3FG?ref_=wl_share

Видео Should booktube only be positive? канала Bookborn