Support for Array Format Data in the Adobe Target Bulk Profile Update API

We have received confirmation from Adobe Support that when importing customer attribute data from non-Adobe CDP sources using the Adobe Target Bulk Profile Update API (v2), although the data is transferred in array format, Adobe Target can only process it as ‘single-value strings’.
If array format can be received, should it not then be possible to handle it as an array within Target?
This would be significantly more convenient when creating audiences, so we would very much appreciate your consideration of this matter.