Maybe your post wasnt as clear as you wanted.
I dont think there is anything wrong with a discussion on the excess of Xmas, people getting into debt just to 'prove' how amazing thier kids Xmas is on social media (and we all know this happens), people feeling shit cos they cant show off mountains of presents round the tree due to finances, circumstances etc.
Lots of people get sucked into the more is best mantra.
As it is I spend my budget and thats it. Kids get what they want within reason and a few surprises (they dont ask for much at all tbh so its not a stretch to get small extras they will love) This year due to circumstances the budget is even smaller and they are totally fine with it. We dont go mad with food, just a few treats for us, as shops are hardly closed we can get any tops ups we need. But as its Xmas we do get things we wouldnt normally have the money for but it all gets eaten 
Its easy for me as I dont have a large family to buy presents for (and I wouldnt be spending £100s on adults anyway even if I could afford to) just my kids and 3 other adults but I can appreciate from the many threads on here that people 'expect' presents for every family member and are pretty crap when posters dont want to do this or cant afford to do it. I dont understand that side of it at all. Adults do not need 20 presents at Xmas to prove how 'loved' they are from every family member, its madness.
You are right in that advertising has conditioned many people to spend more than they really want to or can afford at Xmas and add on the pressure from friends and relations showing off how much they have bought thier kids its easy to give in to it. I think it detracts from the whole winter festival/Xmas meaning (however you celebrate it it should be about family and time together enjoying yourself doing whatever you want to do whether its chilling out doing nothing or visiting relaltives, places etc) Having a mountain of presents means nothing if its just 'expected' or for show. Kids get overwhelmed with loads of pressies and dont know what to do first, cant remember what they all got or who its from or play with a fav thing and leave the rest for another day.
At the end of the day its up to individuals, if they can afford to spend loads and thier kids appreciate it then fine no skin off my nose, but I hate the whole pushing of Xmas from October onwards to buy buy buy or you wont have a nice Xmas. Rubbish. Xmas is what you make of it, its personal to you and your family not some advertisers ideal of what you should do. Buying a ton of crap wont make Xmas better if you are not in a good place to begin with.