But what will readmore tags do? You now have two options: either aren't going to click on the "read more" link, and complain the OP didn't post code, or you do, and end up with the same blob of text you're now complaining about.

I didn't read the blob of code of the posting being discussed. Had the OP use readmore tags, and had I not used to setting to unfold readmore tags automatically for me, I would have clicked, seen the blob of code, and then decided not to read it. I would have to do work to do the same thing I ended up doing now.

The only way a readmore tag would have made a difference for you is if you would not have unfolded the text, and would have just moved on. Who benefits from that?