Dear Neville,
Someone else did to me. I responded. He ran away as always. And you chimed in. 😉
“It takes a much greater posek..”
Agreed. I’m not personally invested here. If kula means something that we should be hesitant about, then I strongly disagree. If it only means that we should be careful not to take it further, I can’t argue too much.
But once the Rema and the Bach wrote that and the following generations allowed it to stand, it is obvious that this was the standard. Compare with raisin wine that was continually being revisited and challenged.