ASW – Alternative hero leveling.

But, for example, "Wide Gates" depends on luck.

So what's the problem? Just make the connection from one or another beneficial perk as an additional requirement for this racial ability.

But this is clearly not a racial ability, but a
machine-related skill.

It's both racial (unique, tied to the race) and machine-related at the same time. Therefore, its position can be in both places. But from the point of view of streamlining, it's better if it's in the racial section, but depends on machine-related perks.