You do realize that this is a game right? Aela is just another NPC. If you can turn into a Vampire Lord infinite amount of times then you should be able to do the same with the Werewolf.
That's not asking too much it is? I'm bored with VL now and I want to play as WW.
Most people like to RP and pretend these npcs with basic coding have actual personalities, think about it, if she has to go through the trouble of cutting herself open and bleed out enough blood for you to drink, don't you think she'd get tired of it?
Also roleplaying games are typically about choices, and choices typically have consequences, bethesda added one such consequence and I'm happy for it.