Maybe?

First, a lot of simple assault arrests are for objectionable but ultimately trivial stuff - people getting into drunken brawls, spitting on each other, and so on. A series of burglaries targeting a local small business can be far more devastating to the owner than that.

But your argument also doesn't hold because it's clear that there are property crimes that are investigated with zeal. For example, in the SF Bay Area, a person was recently charged with "hate crimes" for taking down some pro-Palestine signs. I'm not making some political point here, but we can agree that the investigation wasn't motivated by the severity of the crime, right?