Also this we have discussed, Steam has no problems with WIAB content, at least for now SS doesn't either.
If the change is real and not just makeup that can be patched, it's not because of WIAB per se, it's because some of those relationships may have fruits that will be seen in SG... and if SG loses its patreon, there will be no money, only Steam sales.
If it is patchable, that will be done by fans, the original evil modder does not want to compromise the revenue. Besides, if the story really changes, a fan-made patch can bring inconsistencies by "forcing" certain family ties (this as a theory, not as a fact written in stone).