I like having the options to be able to DPS as a healer when the opportunity presents itself. Even the dev team agrees with this.

Certainly for people who are at world's first level, their goal is to clear it at as low an item level as possible, lower than the one assumed during development. So if you look at the fight and figure out that if it's not numerically possible to clear with four DPS and tanks, you'll need to make up the gap with DPS from healers.
And they're increasing our DPS potential

Since all DPS jobs will be increasing up through level 60, it makes sense to have the white mage's DPS extend by a proportional amount as well.
Quoted directly from the line you pulled out.

Please don't take away the tools I enjoy using when I do dungeons and raid. Thank you.