We measure neutrinos and gravitational waves as well. It's much more difficult though.

In the end, to be fair, we measure both of them with photons (quite literally – GWs with laser interferometry and neutrinos by looking for Cherenkov flashes).

This isn't fair because you can claim that any force that isn't EM since that's the primary interaction any of our sense work on.

Your ideas aren't clever or useful. They are just adding noise to any productive discussion. You might as well just say science isn't real because our senses are unreliable or God could have made whatever happen or a wizard did it.

Between my contribution and yours, which one is adding more noise?

Wow, troll much?

OK, but when I stepped on the scale this morning, I used photons to read what it said. That doesn't mean that I'm detecting EM rather than gravity.

A fair point, but it should be said that a scale also only measures a some sort of an EM-based proxy for gravity, typically the compression of a spring either mechanically moving a needle or being electronically detected with strain gauges[1].

I guess my point was that when we peer to the skies and detect EM radiation at various bands, that's also just a proxy for something else that we're actually interested in. The photons aren't interesting in themselves, it's what we can infer about them by following the causal chain backwards. In that sense, it doesn't matter whether the photons are produced on Earth or a billion parsecs away.

[1] https://en.wikipedia.org/wiki/Strain_gauge

Nowadays it's all piezo.

It is useful to point out that everything we do is electronic in some way. All normal forces are really electronic forces. It just isn't the case that we can't observe forces other than EM, just that in the end everything has to become EM for us to be able to observe it, and... that's not too remarkable considering that we're made of electronic matter and are of such scales that nuclear forces are not relevant except in so far as they make chemistry possible.

For gravitational waves we still rely on EM radiation as it's measured by comparing perpendicular lasers through interferometer.

I don't that's the kind of gotcha you imply it is. Of course radiation is somehow involved in everything, it's what keeps matter together. We also read off the measurements with our eyeballs, and even if you used some sort of braille system, touching things boils down to EM interaction. The primary probe here is gravitational, any musings beyond that are of little value. I challenge you to even conceive an experiment where your own objection wouldn't apply.

Wow, I guess that whole gravitational wave thing and anything with cosmological neutrinos are just hoaxes if I listen to anything you have to say.

No, it is worse than that, every detection capability humans have is only how em interacts with the electron shell around atoms.

We have done some amazing things in spite of what appears a crippling limitation.