There's a huge proportion of the population that doesn't even have the luxury of voting with their wallets because the only thing they can afford is the cheapest possible. Cost of living has gone significantly up in the last two or three decades.

Also a bunch of companies out there are actually under some megacorp. Have fun completely cutting off Nestle or Unilever out of your life[0], for example. The information is there, but it's delusional to think everyone can manage to avoid all these brands altogether for various reasons (access to alternatives, price vs. income, etc.).

[0] https://www.independent.co.uk/life-style/companies-control-e...