No. This concept was first used in Italy over 40 years ago. They choose the appropriate trees.

Some trees only grow a few feet tall. I remember when I was a kid, my mother planted a few such small trees when we moved into a house with a yard.

Depends on what they are.

You can always prune them back too

lmao, funny enough, after someone insisted on finding the address, I actually came across some floor plans in the process.

https://huanggang.newhouse.fang.com/loupan/2620196942/photo/d_house_394820.htm

You sure? It seems legitimate, as seen by the link and the architect's own page, and it seems to be similar to the architect's other projects

There’s a tree though. Those things make roots, and they are very good at digging down, you know.

For a few square feet of your ceiling.

Shrubs/trees and their root require lots of soil and water, which is heavy. A building designed to support trees must support more weight, requires significantly more materials like concrete and steel.

Also, lots of plants and soil attract lots of insects, which is nice for biodiversity, less so for tenants. And these require maintenance. Adam Something did a video on the topic.

It only make sense to grow vertically if plants have shallow root, require little to no soil, ie grass or salad. Or better, plant things in the ground, put solar panels on buildings.

Probably a mixture of the type of shrubs/trees being carefully chosen for shallow root systems, and the stated purpose (other than beauty) being to help absorb CO2 in the city.

Gotta start greening somewhere! Better to improve and still be in a poor overall situation, than to not improve at all!

Greening initiatives take years, or even decades, to reform cities. Every step (that isn't counterproductive, at least) is a good step!