I haven't bothered stressing a wheel during a build for decades. Instead, I (i) install the first head-in spoke in the hub; (ii) aiming the spoke at the point where it will be inserted into the rim, bend the spoke inward over the hub flange a bit past its final angle to the rim; (iii) thread the nipple onto the spoke; (iv) repeat for the next head-in spoke.

Stressing the wheel does the same thing: it adds a slight bend to each head-in spoke where it passes over the hub flange (and does little or nothing to the head-out spokes).

But bending the head-in spokes one at a time at the beginning of the build is easier to do and safer than the brute-force wheel-stressing technique.

The wheel comes up to tension faster, too.