You asked the f****** question. Seco wrote plumbers prefer solder to which you asked for evidence. The fact that solder is purchased hand over fist more than glue might lead people (though clearly not you) to assume that more is used (which answers your question). Unless it's being collected for fun.
If you can't solder and prefer to use your airfix skills, there's no need to suggest everyone else is wrong.
Again - reduce your tone. A sound argument doesn't need obscenities.
Just because a product sells more doesn’t mean it’s better or perferred. It may be more freely available or cheaper.
As for your last comment, I am not the OP so don't assume I can't solder.