I don’t wish to belabor it but a crimp is a better connection than solder as well as generally more reliable when done correctly. Solder is roughly 10 times more resistive than a crimp. That all probably helps the car guys make up their minds too.
I once had a scientist tell me to have his 100 amp crimp soldered too and I went through the dialogue on crimps and solder. He remarked that solder was better than air though, so fill it up.😁
I know you’re fine with the job and it’s fine. Just sayin’.