For a new player, wands are the cheapest form of consumable healing per charge.
Also, that one level of Cleric gets you weapon and armor proficiencies which will be handy if you're an Elf, Drow, or Half Elf with Arcane Fluidity. It makes those lower levels go by smoothly.
It also gets you more spell points than a fighter, paladin or ranger splash would. So if you recognize that your offensive melee is going to be short-lived, it's certainly a reasonable option.
For a Wizard aiming for Pale Master, it also gets you access to Inflict wands, unlike Paladin or Ranger.
Sure, it's a barnacle at endgame, but for a first character endgame is not really a consideration.