Initially I couldn’t get it, the aligning part, to work. Neither with my script or using Hugin. I have wanted to give hdrmerge a try for a while now, so I gave that a try and it worked.
That is the main reason why for me. And it’s always nice to try a new piece of software 
I did go back to give Hugin a second try later on, this time it did work but I did have to first align the 3 sets separately before I could make a panorama. Not sure why my script didn’t work, need to look at that another time.