Remember there are 2 types of crimp the standard, fairly cheap and the more expensive mill spec / aero space. If you go with the standard don’t buy the cheap insertion tools found on eBay ! They are crap and break far to easily.
“Right now I need a Telecaster through a Vibrolux turned up to 10” Memphis in the meantime by John Hiatt
In an average analog xchange, hundreds of connections are pulled every day. These lie in between thousands of lines and are around 15 meters long. Again, on average.
Imagine the power needed to pull one pair out of that bundle and the power transferred to a lot of the other connectors. And then that one pair is connected to a new position. Every connector is possibly used hundreds or even thousands of times before the xhange bed is replaced.
Admittedly, not a D-connector as that probably wouldn't survive such a treatment.
The D-connectors used in digital exchanges do not get replugged very often. There's no need as they carry a digital signal. Still, if it's a crimpable connector, it will never see solder. And D-connectors are already obsolete today. Everything is RJ45...
Telcos know about wiring. It's the core of their techniques. At least, it used to be before VOIP.