"There is a kind of sadness that comes from knowing too much, from seeing the world as it truly is. It is the sadness of understanding that life is not a grand adventure, but a series of small, insignificant moments, that love is not a fairy tale, but a fragile, fleeting emotion, that happiness is not a permanent state, but a rare, fleeting glimpse of something we can never hold onto. And in that understanding, there is a profound loneliness, a sense of being cut off from the world, from other people, from oneself." (Virginia Woolf, To the Lighthouse)
Let's go through the arguments one by one.
First of all, in practice, in 99% of cases we don't know too much, we know too little. Just go to the store and try to pick a good bottle of wine off the shelf. Some people even have trouble remembering what kind of petrol their car uses.
And on such a principled level, seeing the world as it really is does not, of course, cause any kind of sadness or passivity. Knowing things and knowing what's going on is pleasant.
In turn, realising that life is not a grand adventure is just a relief. Whether small events are "insignificant" or not is up to each person to decide, but there is certainly not the slightest reason to judge one's own daily life as insignificant.
The fact that love is not a permanent fairy tale that would be on all the time is simply because love is an emotion. It's pretty basic to know that emotions are mutable. They can also be dealt with in a changeable way.
That all this should lead to loneliness is a degree more wrong. It's precisely not having the big extreme emotions on all the time that allows you to be social, to be able to talk in peace, about anything, with anyone.
And the most total error is that giving up the crazy emotions would cause separation from yourself. On the contrary! It's what allows you to find your truest self.
Virginia is competing for the title of bad thinker - in the premier league, no less. But hats off to her for trying to organise her own thinking. Even if it doesn't work very well, it's still an attempt at urban stoic.