Not at all. If you are coming up behind someone slow down and a polite ding on the bell and they let you pass. Or at least they do with me. "Thank you very much" and off you go.
But with some cyclist, slowing down means being held up by peds. Who by the way, have every right to be there. If people are in such hurry, they should take the car.
If Danes from outside Copenhagen were reading this thread, they would be wondering what allthe fuss was about.
The post you quoted says "I'm down to walking pace". At the risk of that very same sarcasm myself, I use brakes for this.
@briantrumpet stated that peds walk the entire width of shared space and slow you down.
@mjr stated you could use a bell to tell them you were there.
I replied that in my opinion you could do that, but you would still have to slow down, for the reasons stated in that post.
Thus, the thrust of my point is that if you are slowed to walking pace by enough peds, you are better off, as
@briantrumpet is saying in the first place, using the road.
Now, if I happen to be on a shared use path, I will slow to the pace of the peds (using brakes

), I will let them know I am there (with a bell or a shout), and firmly believe that we should all take care for the most vulnerable in each situation, with vulnerable for modes of transport being those moving the slowest, so cars on road slow for bikes, and bikes on shared use slow for peds.