In any edition prior to 4e, if you played as wizard/sorcerer and started at level 1, it was always partially survival game. Every combat was life and death struggle for survival since even the basic goblin could one shot you. So you grind and fight and try to survive for those first few levels until you get those sweet sweet spells.
On the more serious note, for some reason most people here equate survival campaign with basic wilderness survival. It can be that. But survival is much broader style of game in which basic wilderness survival is only one part. Other part could be evading things that see you as lunch. Or tribe of local humanoids who want to capture/kill you.
For me personally, survival campaign was more like SERE school.
Survive - basics, food, water, shelter
Evade - local fauna that sees you like food
Resist - if you run into hostile local population
Escape- if you run into something that is obviously stronger or if locals capture you as their slaves/sacrifice/food source
And yes, magic can do lots of things. But slots are limited. Choice of prepared spells is limited. Magic is finite resource, specially in Tier 1 and for half casters. It's kind of thematically appropriate. Do you cast spell for auto sucess but risk it if you need it later or you gamble and try use skills while saving magic? How is that not in tune with survival theme.