Casters to replace the role that an non caster can do, needs to spend an spell slot. And an wizard needs to have knowledge to prepare. And Wish, is a tier 9 spell. Takes an long time to get Wish. Also, Wish is very DM dependent. You can't for eg "i wish that i an a god"(you can, but the DM can make you become an immortal slime demigod being burned eternally on plane of fire, or simple say that the spell failed because <<insert any reason>>). And items can give this "powers" to martial classes. Also, depending your heritage, you can get wings.
No, casters don´t need to prepare a spell slot necessarily
![[Linked Image]](https://i.imgflip.com/3535oj.jpg)
Items also give powers to caster classes, In fact most non-martial classes cannot use them unless they spend ponts to do it in the build: scrolls, wands and rods.
Same as always, you need to change your build and level-up to do the same as a lvl 1 wizard with a bunch of wands and scrolls.