I also have used fiber optic jumpers in place of pigtails for customer directed repairs. I prefer proper equipment use per application, however I have noticed that with a fusion splicer the only complication is either the fan out assembly or the splice tray fit and the lack of color coding possibilities if using only jumpers .I do like the ability of testing a connector prior to splicing it on, but following the pigtail termination I always OTDR the fiber to ensure quality installation. That is followed at the completion of a installation with a light loss meter.

Yes, cutting a jumper gives you 2 connectors. but 2 fiber pigtails are purposed for the task of providing connectors for a permanent link installation. while the jumper is purposed with the task interconnecting two such connectors.
Standard designs that customers receive are clearer to understand as the specific function of each item is known. If the bill of materials reflects : 144 pigtails for 12 individual 6 strand fiber cables and 72 jumpers to connect to equipment to ports provided. but the list of extra jumpers and nonstandard use of jumper cables in a proposed design might be enough to scare a customer away.if i was a contracting officer and I read: 72 jumpers to be used as pigtails for 12 individual 6 strand fiber cables and 72 jumpers to connect to equipment to ports provided.