When I say that, I always mean safety and performance, which is the things I care when something is not standard. Of course I understand why an electrician wouldn't solder wires, it's what I said, overkill. Not necessary to seal that good a connection in these scenarios.You just mentioned two disadvantages.
Time is money for the electrician. He has no time for soldering/desoldering. What about trouble-shooting? being able to disconnect is useful, right?
I was simply worried I was being told "don't use it" because it was not safe or performance wise, and that is why I have been asking that please tell me what kind of problem can develop in a sealed soldered connection that can't in a block or wire nut. Being able to troubleshoot and disconnect is useful, of course. That's why I don't solder my PC wire to the wall outlet. I hope you realize that I solder things that are supposed to be permanent or there for a long time. This time, this lamp was not touched a single time (only bulbs replaced) for more than 40 years.