Yup fair point, and to an extent I let where phones would likely be required to be a driver in the layout.
So for example, in bedrooms I ran out four pairs typically - one positioned where a phone close to the bed would be most likely required, and then the second where you might have a TV or computer etc.
Having said that, at least with phones, you can split one port to support up to 4 analogue phones if required (although you will get some crosstalk from the ring signal bleeding through to other lines).