> As far as I'm aware moves are only done when explicitly asked for

Certainly not. Move are attempted (in the sense that the move constructor/operator= will be called if it exists) from rvalue references. Those are for example all temporaries. That has let accelerate all C++ programs using std objects by simply recompiling them (with the new versions of the objects supporting the move while it did not exist in the old versions)

Well, it makes sense to move temporaries. There's no point in copying them again if the original won't be used.

> As far as I'm aware moves are only done when explicitly asked for

no, every time you have a function returning a temporary you can have a move, e.g.

    std::vector<int> myfun();
    
    struct myclass { myclass(std::vector<int> v); };

here if you do

    myclass c{myfun()}; 

there can be a move