DM Bears:
I do find it a bit strange since you are actively steering the steed. It's not like you're involuntarily being dragged along, but hey, them's the rules.
I get where it's coming from, both from mechanics and real life comparisons.
Mechanics-wise, assigning the Player's action economy to controlling their Mount functionally makes Mounts waste the Player's powerful and more widely useful Actions on something trivial (swapping out all a Player might do in return for a minor, situational speed boost that you have to pay and care for in perpetuity, and that can die very easily). It would require making a whole other set of rules for Mounted Combat or classes that focus on being paired with Mounts as well, so in the end it's a lot easier both for developers and Players to just have a more simplified rule that everyone can use equally.
Real Life-wise, I've ridden on various animals before: namely horses and even an elephant once. Animals aren't vehicles that require the rider's constant control to do anything by - the rider is basically just prompting the mount to perform a series of trained behaviors and holding on for the trip. If the animal doesn't want to do so for whatever reason, there's not much you can really do about it. ^^; Even when a mount is very docile and well-trained, it's still a living creature carrying you around outside of your total voluntary control.
Not to belabor the point, but in the case of Wifni and Farwalker here, Wifni qualifies as a trained but unintelligent mount by the rule's standards (that is to say, she's not an untrained wild animal nor does she have an INT high enough to do critical thinking as Zula does). So Farwalker issuing Wifni to use Disengage and Move to carry her around would fall under the "interacting with the environment" tier of the Action Economy. Basically something that would be like a quick sound, gesture, or pressure nudged into Wifni's sides to indicate what she wants to be done. Since it's just Farwalker urging Wifni to do something she's already trained to do and not requiring any unique circumstances or coercion (like an Animal Handling check for making Wifni do something she's not trained for, or is adverse to attempting normally), it doesn't warrant a full use of the Player's Action.
This message was last edited by the player at 16:45, Wed 13 July 2022.