BI does not stop people doing meaningful things. Society will (mostly) reward things which add value. We have a very efficient system for that, and it doesn't go away under BI.

We are already spending massive amounts of money on disease, fusion and so on. There's no issue there, and BI doesn't move that needle.

At the moment society (especially in the US) operates on a "add value or starve" basis. (That's an over simplification, but the underlying "morality" us strong in that direction.)

BI moves the needle for those who are not "adding value" (in a materialistic sense.) Artists and Authors are free to spend their time creating works, of which a rounding error will have any value. Sure there's some unappreciated author out there cranking out literature, but there's also everyone else cranking out rubbish.

BI doesn't make 'big things' easier to do. Arguably it makes them harder. Rather it allows individuals to gain satisfaction from little things. Budding poets can write all day long. But if (great) poetry is currently ignored, do not expect much on that front.

I say this not to denigrate BI but rather because allowing the meaningless is precisely its goal. To miss that is to miss the point. It allows people to find worth and dignity without having to add value to society.