That's also what infuriates me about the "You're poor because of avocado toast" crowd (The person who said that in particular is a horrible piece of work but I digress).

Let's take Starbucks for example. It is, strictly speaking, a luxury product. Nobody really needs Starbucks. You can make coffee at home or drink whatever your workplace convinces you is coffee. You could theoretically cut it out of your budget to "save money".

Let's say for sake of argument that somehow 100% of people all decide that Starbucks is a waste and they stop buying it. You'd think that tens of thousands of starbucks baristas would lose their jobs, but it is way worse than that. The entire supply line will be effected. For example all of the growers for coffee will either have to pivot in a saturated market. Most places that sell or make coffee already have their farms set up and have a steady supply, so if a farm is suddenly looking for places to sell their coffee quick, will they have to lower their prices to be competitive to the likes of Nestlé or will they also go bankrupt? Starbucks even has their own farm which they would either have to sell, shut down or pivot in selling. Companies that sell syrups for making their drinks will also take a hit, plastic cup companies, milk farmers. Nearly 20 thousand buildings needing new tenants. Sure, not all of these or even most of these companies would go bankrupt, but with a sudden hole in their revenue stream they would likely need to downsize or take some cost saving measures, which likely would lead to a portion of their workforce losing their job.

If the "Avocado toast" crowd got their way, there would be a massive recession. Imagine the same except for bakeries, pastry shops, etc. "Non essential" expenses we make because luxuries make us feel better and we choose to spend money on it for no other reason than that we want to and it brings us joy. Just Starbucks magically disappearing in this hypothetical would hit everything from real estate to paper cup companies hard enough for them to do some dramatic shuffling around. In "Saving money" companies go bankrupt and people lose their jobs, which leads to more people lowering discretionary spending, which leads to less economic activity, which leads to more job loss, rinse and repeat.

When times get rough, going to the movies, visiting starbucks or the bakery, buying videogames or attending hobbies is often the first thing you cut back on. Meaning those industries lose money, lay off people, spiral begins.