Since Rogers (Xfinity) TV and Internet and Home Phone are now available through one "gateway" (home phone is no longer a separate modem), it is more work both technically and business-wise (billing, etc) to separate the three options.
Therefore Rogers is unlikely to provide stand-alone Home Phone for the very few who might want it.
With Xfinity (IPTV), originally it was not even possible to have a TV-only package, but that is now possible, I'm guessing due to enough demand. This is why Rogers "pushes" the bundles and provides a good discount to those who take a bundle and also commit to a two-year contract.
Rogers also used to provide "vacation stops" for each type of service where you could be billed say $10/month for each stopped service while away on an extended vacation (with Legacy Digital Cable) . This is no longer possible with Xfinity. It's all your services or nothing.