for a standalone house in my area (lakeside near Zurich, Switzerland) you'd pay way more than 3M... apartments go for 2+.
However then your interest rate is not 1%. The best I've seen is 30 year fixed, where you pay off your house is 2.5%.
I'm paying 0.65% right now, thanks to SARON going to 0.
It just does not make financial sense to pay it off even if could.
my wife doesn't drive and we wanted to have access to good public schools and good transportation. this is not a given if you go more rural. The postbus goes maybe every hour or so.
the lakeside communities near Zurich are great and all of our friends live in one of them (on the same side of the lake of course). not living here would have severe effects on my wife's and our kids' social lives.