In EE GH, probably not. But EH? Older EE content? It's been a LONG time since I've ran a first-life toon, so I can't say from personal experience, but I strongly suspect that there's quite a bit of content where a first-life toon can get usable DCs, and where each additional point of DC makes a difference. Without giving up the option to Light-nuke.
But I'm not saying Light-nuke-only-types are bad or ineffective, or that everyone should be a DC-caster. Build and play what you find fun, of course. I just challenged the claim that dumping DCs is stronger offensively, and haven't seen anything to convince me otherwise.
They are not set in stone. I can twist in whatever I need to depending on what I'm running.
DCs...survival...damage...spell pen...whatever.