I’m afraid so.
I’ll try and explain my viewpoint then keep quiet because I know they are hated.
I think chains are extremely dangerous and should be banned as there’s no limit to the tightening.
I think head collars are extremely cruel, even with extensive desensitisation training a lot of dogs are really unhappy wearing them.
I don’t like seeing dogs scraping their faces along the floor and pawing at their faces which I’ve seen too many times.
I think prong collars when used sensibly, as in a feather light touch, no ‘corrections/Leash jerks’ are fine.
I get that they look terrifying but I really don’t think they are as cruel as claimed.
With regards to your training approach polly my dog is a master of perfect heel work in the house.
I used the very same method you suggested and yes in the house, a boring environment with not much to do it works great.
It works fine in the garden too.
But transferred outside on a proper walk she’ll do it for as long as she’s hungry but sooner or later she’s not that interested in the treats anymore no matter how ‘high value’ they may be.
She isn’t massively food motivated anyway.
I understand I can also use a toy, the trouble with that, is she will play with toys over anything else.
No sniffing, no exploring, just toy.
She’s walked into things before because she was too focussed on the toy.
I don’t think that kind of obsession is healthy and it’s not something I want to encourage.
I have also done the stop and be a tree and the turn around for months at a time.
And I’ve used a head collar (never again) and various anti pull harnesses.
As it is, she is rarely on lead as her recall is so good so on the rare occasions I leash her, to get her past a dog say, I can hold her attention and use treats but no way would she keep it up a whole walk.