You mentioned one: area of expertise. Maybe the structure of the database isn't too intensive, so you decide to offload some of the logic development to a team member that is more database centric. May not be ideal, but if you're crunched for time...

The database hardware has significantly more resources than other servers and you can't change this.

There are other applications that may need the logic outside of your code. Some report writing tools may not be able to utilize a web service or an API. You could duplicate the logic or if you feel the requirements may diverge.

You mentioned one: area of expertise. Maybe the structure of the database isn't too intensive, so you decide to offload some of the logic development to a team member that is more database centric. May not be ideal, but if you're crunched for time...

The database hardware has significantly more resources than other servers and you can't change this. This may not apply to this specific situation, but may need to be considered.

There are other applications that may need the logic outside of your code. Some report writing tools may not be able to utilize a web service or an API. You could duplicate the logic or if you feel the requirements may diverge.