Choiced Pokemon (especially Scarf sets) do not always require full coverage of 4 moves, so they can always fit some utility in status moves, such as Defog, Healing Wish, Trick, Stealth Rock, Aromatherapy, Toxic etc. etc.
It always comes down depending on what's a Pokemon's role is on the team to show its moves. For example, Choice Scarf Landorus-T can fit Defog on its set, so can Tapu Fini and also go for Trick to cripple walls like Blissey just like how First Sinner said. While it may sound awkward to use status move with a Choiced item, with a bit of prediction and easy force switch-ins you can pull out a Defog/Aromatherapy, etc. etc.
For example, if a Calyrex-Shadow is facing a Necro DM, then it's obvious that the opponent would switch out their NDM to a Yveltal, etc. At this moment, you could use Aromatherapy to cure your party or even Trick your Choice item to the defensive Pokemon as it's an obvious switch-in.
Here's the set for Choiced Calyrex-S for example:
Calyrex-Shadow @ Choice Scarf / Specs
Ability: As One (Spectrier)
EVs: 252 SpA / 4 SpD / 252 Spe
IVs: 0 Atk
- Aromatherapy / Haze / Nasty Plot
- Astral Barrage
A Scarf Calyrex-S is not going on full out coverage, it's a revenge killer that can also cripple Defensive walls with Trick. Henceforth, it carries maximum two status moves and the rest other are two STABs as it doesn't need to kill a Yveltal easily it won't run something like Draining Kiss.
Choice Scarf sets of any Pokemon are more likely to carry status move compared to Band/Specs, as the latter might need more coverage than utility. However, they can run some kind of status move, like Thunder Wave on Scarf Xerneas, Toxic on Ho-Oh, etc. exactly what Assault and Manectric said.
There's also lures with Choice Scarf set, for example Gengar in OU carries dual STABs, but also has Trick + Nasty Plot so to surprise its counters.
Today, me being me, I decided to use a Choice Scarfed Amoongus, so that I will atleast put one opponent to sleep.
Defensive Pokemon carrying Choice-d item is not non-existent, as seen in the case of Tapu Fini. But, it's having access to Trick and Defog is why it runs Choice Scarf, not the same case as Amoonguss. For it, being choice locked to Spore or any move is downright bad, also its Spe is pretty mediocre already.
Hope this helps!