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Assuming you're never going to use it then yes.
I did it in a few spots here (green lines) for power, network and speaker cables.
Used a 20mm bit for the bottom ones and 10mm for those just carrying speaker wire. Put some conduit in the 20mm ones to make it smoother to shove stuff through.
Not sure of thickness, something upwards of 250mm I think.
Seem to remember I fished it through with a combination of rigid wire (earth cable I think) which I hooked with a coat hanger and taped the wire to the earth.
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I went through the basement to get lights in the alcoves recently. Only useful if you have access.
Cable came down 3 m from the bit of the basement I can stand in, but I fished it out with a bit of rope looped out the end of a plastic pipe, hooked the cable then pulled the rope to trap it. Worked surprisingly well.
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Use a hoover to hoover a small thread through the hole, attach to speaker cable and pull through, same as you might thread a di2 wire through a bike frame.
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I'm trying to get a speaker cable from one side of my brick fireplace to the other; can I drill right through? How thick will it likely be (Victorian terrace)? If I have a hole in the left and right side, how do I fish a cable through? There's a cast iron fire still in place and I don't know how much access I'll have.