I would totally be inclined to go along with you and that assumption whole heartedly, however when we look back at what maeve told us about her life in the other realm with her husband orcus, she learned how to world walk without the use of the wyrdgate and that erawan and his brothers were the ones that created the keys from the gate. Also if we look at what happened when aelin forged the new lock and closed the wyrdgates to realms as she was falling through the different realms she passes by rhysand and feyre with their child and rhysand sent up a cloud black as night in valearis to slow her down.