Perhaps he means that a reactor is extroardinairily expensive to build, given that there are lots of easier ways to generate power.
So recently on our server we just 4x'd the nuclear output but no one has tested it yet. I may turn it back. I think I was listening to the FTB forums without doing my own research, and that was dumb; many people here give up way too easily. If you are in DW20, set up your biofuel steam setup: it is so cheap and so easy that there is almost no room for anything else. It's too good to not build. If you're in Mindcrack, then Nuclear reactors are hugely overlooked by this community.
It turns out these thorium-hybrid reactors are doing amazing things efficiency-wise. To the point where you can actually make fuel-neutral type I reactors that run around 200 eu/t. Let's restate that for effect,
nearly fuel-neutral type I reactors at 200 eu/t. And in a world where thorium is available, copper is never in short supply, so 500+ copper for a build is simply a non issue. And the costs for nuclear reactors have been substantially reduced anyways (thorium cells don't need dense copper). One reactor gives you like 280 million EU. It's crazy.
Contrast this with what you need for Advanced or Compact Solars. You can work your way to infini-power, but by the time you have a sufficiently dense field you could have had two safe high-output and automated reactors that work rain or shine doing the same work.
So I am not sure "easier" is the right word.