How does a lvl 99 character not ALREADY have status ailment defensive item, or Tons Of Money from helping the Hero defeat the Demon King??
One who left without taking ANY reward from the Kingdom and "disappeared mysteriously" (Only Les Priestess found her by ACCIDENT because of the Dungeon and Ring)
Yui clearly only got involved in regards to, and likely any PROTECTIONS belonged to the Party which she surrendered because she had no need for it (one of those "wish I did take it" but looked like if Ryouta hadn't ran into her and proposed, she would have gone up into the mountains or something living in obscurity because she had NOTHING left to really live for now that she got her REVENGE! She was surprised Ryouta still remembered and loved her as when she did her REVENGE she expected to have been FORGOTTEN or believed dead by anyone left who knew her) and as for money, she likely only took as much as she felt she needed for travel (as said, likely planned to see her parents, then park her ass on some mountain or something as a hermit, no need for too much then what she can carry!)
If she has powerful Martial Artist exclusive weaponry, she might have sealed them away somewhere in the house after marriage expecting never to use them again (The type of thing if they have a daughter, said Daughter would "find by accident and decide to follow Mom's footsteps" like Naga the Serpent from Slayers did when she found her dead mother's "Bikini Armor" when she was young, the one she wears and luckily was able to get her mother's figure to fit into properly LOL!) as also remember she's hiding from Ryouta what she did during their separation after her parents were killed and she ran away from home to meeting again years later (period of the story start) mostly because she didn't want him to think LESSER of her or be scared of her (She wants him to see her as he REMEMBERS her, hence the "Level 1 Wife" thing....despite the fact even in her Martial Artist gear and hairstyle, and MUCH time since they last saw each other, he recognized her INSTANTLY! Which is WHY I believe he DOES know she's a Martial Artist and her whole "hiding it" was comically pointless!)
It's one of those "didn't think things through" situations!
Also seeing how OP Slyphina is as a Healer, it's likely if she WAS confused or hit with an Ailment, she was cured on the spot, or there was PROTECTIONS already! Only reason she got confused in the first place was from a Confusion attack that was "done by a fellow Level 99" that she RAN RIGHT INTO!" So that was why it had great effect!