Fwiw, they seem to imply (admit) that you can get precise growth using

    s.reserve(n); // precise allocation.
    s.resize(n);  // doesn't grow.

or

    s.reserve(n);
    s.append(....); // a fairly robust set of overloads.

That being said... I completely agree that imprecise resize() is unfortunate, and unexpected. I'm going to have to keep an eye out for how I use resize() going forward. (Not a lot, admittedly).