It wouldn't be "forcing" it's use, it'd just be presenting more options for customising your army.
Eldrad: BS4/WS4 Guardians
Spiritseer Farseers: Wraithguard troops regardless of size
Some ranger special character: Changes to pathfinder/ranger squads
Wild Rider character: Vypers as troops, changes to jetbikes
Court of the Young King/Autarch: Aspects as Troops.
If you want to run Eldrad but have no guardians, you can. If you want a Spiritseer for your one squad of 6 Wraithguard, you can. Anything to move away from Jetseer and Mechdar being the only ways to play the army.
In a similar vein, lots of people take Baron from the DE codex. That doen't mean that the only troops they take are Hellions.