Lol no not necessarily, unfortunately. You just get used to the same old fish in the same old parameters after a while, and a change is good. Also, if you have your heart set on a fish that requires very soft water and you live in...well, Calgary, you too will find yourself yearning for softer tap water.
A lot of African cichlids actually prefer hard, alkaline water, so it's really easy to keep African Lake species here. Well...easy is always relative, but you know what I mean.