I tried to draw a layout for Bootstrap, the layout designer says that it won't work. Tell me what's the problem?

Question

Design

I read, looked at the info about bootstrap grids, tried to draw a layout. 12 columns turned out to be not enough, I googled, found that this is not a problem (getbootstrap.com/customize) just here you need to change the number of columns. Made 16 columns. The coder says that using bootstrap it is impossible to make up. Tell me what's wrong?

Answer 1

The maker is wrong.
It is more convenient to work with 12 columns, but this is not critical.
What is his argument?

Answer 2

Make up something - perhaps .

Answer 3

Tell the layout designer to type on 12 columns, but the container will simply specify max-width: 1600px for example