Was not is. Only in the most easy of fights now do RDM's and scholars really become solo healers and it should really remain that way, as it encourages more multi-job approaches, rather than just plop one healer/support into a party and ignore every other job on the list.
RDM and SCH are more than capable now to heal in low-man situations that don't require spike healing and the adjustments I offered in the previous thread should keep both jobs balanced out as the level cap rises to 99. Even if we don't use Cure V to the efficiency WHM has, we'd still bump them off the radar if we had ANY form of high spike healing. And I don't agree that RDM or SCH should have that capacity, given the fact that there are plenty of jobs available with hybrid capacities that could easily bump a bread-and butter DD off.
This way, in situations you have a WHM, you can have a more dedicated DD even in easier functions. And for situations in which you have more Hybrid jobs or less damage, the lesser healers such as RDM and SCH can have a place and be able to still do their own duties primarily.
For the healer role, and perhaps other roles as well, people need to stop looking at the absolute cap of what a job can do, and start looking more at what gets the job done. Because that is what really dictates 'invite rate' as flawed of a concept that is these days.
It's not so much what's best as much as what's overkill. And expanding the burst curing potential of RDM and SCH will narrow that area between 'to little' and 'overkill' which will promote job variance.