I can see your point and some Anglicised food I do enjoy (for example, quite a few of the BIR curries) but I think a lot of the hate for mince-based chili comes from a combination of factors.
First off, it's a dish that is cooked at home (badly) a lot by amateur cooks that assume shoving mince and chilli powder in a pan makes chili. On top of that, getting good quality mince is also something that is not that simple to do. Yes, you could go to the butcher and ask for some decent chuck mince mixed in with a bit of rib or brisket or something but that's often too much effort for your average home cook. Then you've got the problem with mince of cooking it correctly. It's actually harder to get mince right than it is to get a few pieces of shin or whatever correct. For the latter you just "cook it for a few hours until it is tender or falls apart, if you like it that way".
I agree with you that it's possible to use mince to make a good chili (probablyI haven't done so myself) but I also think that one of the most simple improvements you can make to a classic anglo-chili is to swap out the mince for a tough cut of beef and cook it for longer.
The chili powder suggestion is a reasonable one though I personally have preferred results when I keep my chillies whole and only prepare them just before I'm about to use them. They seem to retain a lot more flavour that way.
I think you're dead on with what your saying, I guess we all grew up eating a bunch of dishes based on awful grey mince that ended up being boiled rather than fried, but it's a shame that so many people seem to give up on it.
Personally, while I enjoy chunk meat based chili, I feel like it's a fundamentally different dish. It scratches my itch for a stew rather than a chili if you get me? I enjoy a chunk chili in a bowl with some corn bread, but I love a mince chili with some rice or nachos, or on a burger or a hot dog.
Obviously with the chunk meat you get the tender pieces of meat and unctuous sauce, but with mince you get ridiculous amounts of surface area which, if properly browned, can pretty much blow your head off with maillardy goodness.
PS: Nice to meet a fellow manc with some interesting views on cooking.