I humbly hope that it is ok to sort of disagree, kind of like sort of, in general, for the most part.
This, based on my observations of two things: other people and myself.
Materialism and Consumerism usually occur together. However, Collecting things is not indicative of Consumerism. Consumerism implies use, discard, replace, use, discard, replace, repeat rapidly long term.
Collecting implies not using to rapid discard and rapid replace cycles.
Therefore, I think that Consumerism is not related to collecting.
Next, you mention Materialism. I have interacted with many people who practice Materialism and who are very non-Spititual. Most of these people collect something, but almost none of these people collect flashlights. I have interacted online with people who collect flashlights, and I can say that I have observed that people who collect flashlights are very spiritual, a lot more spiritual than the general population.
Next, myself. In 59 years, I have collected very little. The total quantity of possessions that I have is very little. I have never owned a television, I have never purchased a roll of paper towels. The real property that I own and live in was given to me as a gift, by friends, not by family. The reason that I collect flashlights is that of all the physical things that can be acquired with money, flashlights bring me more happiness than anything else. I know that complete, long-term happiness comes from God, not from material things. For less than the perfect happiness that comes from God, for me, there is flashlight collecting.