Q: Generating photo title from the photo's file name - can I do it with an automated procedure.

I have imported into Photos thousands of old images with long and descriptive file names.  The problem is that the Title metadata remain empty for all imported photos.  I would like to set each photo's title to its file name.  I've been going through photos and copying the file name to the title on a photo by photo basis, but I've simply got too many images to get through them without making it my full-time job.

Is there a way to automate the assignment of file name to title in situations where the title is empty?  Is there a way to request that the title be set to file name during the import process?  (To Apple: if not, why not?)  Can I write a script to assign title from file name?

Thanks for any idea you can offer.