This society can't exist.
Being unable to speak for yourself and your wants/needs/desires, and having a society that revolves around personal liberty is impossible; the two concepts are mutually exclusive.
Either you can, as a society, speak up for yourself, or... you naturally "go with the flow" by "reading the air" and "seeking group approval." Both are fine, but they are very different societal outlooks... and Only One of those allows for a society that has adventurers.
The "Japanese Society" option does NOT have boukensha (when Japan did have such things, society was... very different).
So... no way is this MC going to politely agree to be disowned by her parents, kicked out of her house, and then go practice something she dislikes simply because others want her to make them happy.
I mean... no fucking chance.