Nobody ever said the world had meaning.
What is being said here is ideas have meaning. And to use ideas in a meaningful way requires an understanding of the ideas and the autonomy to decide which ideas are good and which are not.
If the human mind does not have the freedom to design a car or building or paint a picture that has never existed then those things could not exist.
That's not an argument, that's a proclamation.
Arguments are made up of proclamations.
Plate tectonics creates ridges, coast lines, wind erosion dune patterns that have "never existed" too - every day.
Those do not involve planning.
To plan something new and then to build what you plan requires autonomy.
Planning is an autonomous activity. It is creating the future with the will.
Autonomy is a given if the world makes sense.
The world is under no obligation to "make sense" (to you).
What a miserably worthless platitude. And a total non sequitur.
The mind gives meaning to the world.
With a mind the world does have meaning.
If the mind has autonomy.
If autonomy is a delusion then there is no meaning anywhere.
That is why it is a given in the real world where people are punished for their decisions.
You only punish that which could have done differently.
If that is so (and there are philosophies that consider the goal of punishment to be primarily determent, in which case it doesn't follow because with a change of pull- and push factors, someone who could not have done differently could maybe only have done differently), it shows at best that punishment is irrational.
How do you deter something that does not have the freedom to decide?
The notion of autonomy is not so easily waved away. It is an intertwined part of human society.
Every single society that initiated a justice system and punished people for sins or crimes has totally accepted the idea of human autonomy.
If scientists actually believed this bullshit they would be up in arms and demanding radical change.
But since they don't it must be assumed they have autonomously decided for themselves it is really total bullshit.