Not a niche opinion at all. It just depends on who you are asking that question to.

There are plenty of non-action/less action anime (You and i are Polar Opposite, Love Unseen Beneath the Clear Night Sky, Akane-banashi, Nippon Sangoku, Orb: On the Movements of the Earth, Oshi no Ko) and the that list goes on which prove that you don't need need constant action to be great.