I have lost f customers because of this stance I take with roller transport film, I am getting too long in the tooth to explain hairline scratches that become evident and why I refuse to handle the spotting of such mess.
I am not sure how many professional printers are on this forum, but those that make their living enlarging film to print will surely agree with this stance.
If your prints are sharp, and mine are , all defects in the film will show on print, and you are just taking a roll of the dice approach with roller transport film processing.
I don't care how well the machine is maintained , thats why all the labs use an Ice program to fool the masses.