Using VPCs with the Tile operation?

[chameroy]

I attempted to use tile to retile a group of LAZ files using a VPC:

pdal_wrench tile --length=1000 --input=group1.vpc --output=group1_retiled.vpc --output-format=laz

However, doing so resulting in a message stating there were no input files. In order to get the process to go through, I had to provide --input-file-list:

pdal_wrench tile --length=1000 --input=group1.vpc --output=group1_retiled.vpc --output-format=laz --input-file-list=file_list.txt

Isn't the VPC supposed to provide the list of files to be processed? Doesn't it seems odd to require --input-file-list when using tile with VPCs?