We seem to have some people who have trouble parsing between 'This is a person's own choice to make' and 'you can still criticize a choice as unwise.'
If a person wants to, they can make a hobby out of building a luxury log cabin over the course of a few years, then immediately burning it down as soon as it's done, then starting over again.
It is their right to do that, presuming reasonable fire safety in the demolition, and so long as it's all with their property, their labor, etc, the government and other people have no business forcing them to stop.
It's still a damnfool thing to do, and it's perfectly fine to tell them that.
'You're allowed to do this' and 'This is a wise decision' are not the same thing.
So it is with consumerism. If someone wants, they can blow every bit of spare spending cash they can squeeze out of their budget on Star Wars merchandise, or trying to get every single game in the Steam Store, or having their kindergartener's finger-paintings framed in bullet-proof gold-plated frames.
Just because they can, and it would be morally wrong to force them to stop, does not mean it is not foolishly wasteful of them to do so, or make it immoral to tell them such.
Spending money on the lottery is a waste. Any state instituting such a thing is doing something evil. Yes, people have the freedom to waste their money in such a way, but it is extremely foolish and wasteful, and feeds into a destructive system.
So it is with women who just need to be up on the latest fashion trend, men who just have to have the latest tech-gadget, etc, etc.
To some small degree this is relative to wealth. If you're a Billionaire, buying one of the newest tech gadget each time it comes out isn't meaningfully wasteful to your budget, nor is it driving consumer production scale to stupid levels, because billionaires are bloody rare. Even then though, you can do this in foolish ways, or wise ways. The wise man will know that wealthy first-adopters are what drive investment to make a product cheaper and available to more people, so they'll buy, use, and give feedback on products that they think are good to see proliferated through society, rather than just mindlessly go 'it's a new tech-widget,' must have.
To try to sum up the issue another way:
If I were a rich man, I might buy a pizza for dinner every night. I love it that much, and I'd just change which brand I got to keep it from getting old.
However, I would still eat the leftovers for breakfast the next morning, not throw them out and order a new pizza each time.
This basic principle can apply to almost anything.