All the Symbian devices used resistive touch screens, though, didn't they? E.g. the Sony Ericsson Vivaz. So the user experience was not quite the same as with capacitive touch.
But I think they only released such models with Symbian for a couple of years, before switching to Meego and then later Windows Mobile OS.
The N900 was released more for a question of honour than anything.
However you have not read the links, not all models were alike.
> The Nokia 7710 is a mobile phone developed by Nokia and announced on 2 November 2004.[1] It was the first Nokia device with a touchscreen