First (there's no such word as 'firstly', if we're being strictly correct. But, then given your posts, we aren't), that's true, except it doesn't change the fact that you were talking about NEUTRINO detection, not GRAVITON detection.
Secondly.
Photons, and all other carrier particles, are massless and carry no charge.
Can you see things?
Well, I think that implies that massless, chargeless particles can interact.
Thirdly: Whut?
Fourthy, you're just wrong. Very wrong. Photons are just ONE EXAMPLE of a luminal particle (as it were). All the other carrier particles travel at light speed TOO.