Umm...........What?
The spokes traverse from the hub to the rim in a straight line, and direction relative to each other depends on the pattern in which they are laced.
If the spokes are laced radially and staggered correctly, the resulting spoke path will radiate directly from the axle center to a perpendicular intersection with a tangent to the rim arc at the spoke hole.
A simple concept that is wordy to explain. In essence, there will be no angle at the hub or the rim.
If they to not traverse on a directly radial path, it is because they were not laced to do so.

Twisting the hub of a correctly laced radially spokes wheel cannot be kept in that orientation after tensioning.
Tensionong the spokes would straighten things up in a hurry if the spokes were in fact laced radially.

The OP's wheel exhibits a pattern in which the stagger between flanges is not radially laced;
but, rather, the spokes pull in opposite directions (as in a typical cross-laced pattern, just to a lesser degree) resulting in the slight angle.
However, even in a cross pattern laced wheel, the spoke from a trailing staggered flange hole would traverse to a trailing hole in the rim.
The pattern used on the OP's wheel laces the spokes from the trailing staggered hub flange holes to holes in the rim that lead the spokes that they trailed at the hub. Viewing photo #1 shows the spokes pulling in opposite directions. This is the reason why.
Simple as that.

I am not saying that it is right or wrong; it simply is not a true radial pattern.
It may have been designed precisely that way.