Individually we do not make much of a difference in anything but that's an excuse to avoid searching for a better company and often tolerating a worse offer (e.g. a fair trade product that costs more, or lacks modern features).

Change in politics certainly matters but your individual support of a political party in terms of one vote has practically no affect on the result in a winner-take-all/first-past-the-post voting system. Your individual "vote" in support of a company is at least a non-zero value, and sometimes is multiple "votes" per year.

People often say it would be better if just more people voted, but that's only helpful for them because they imagine they would vote for the main party they like the most. I doubt that's the case. The most important structural reform imo is to increase the representation of the public in government - and it's not a main party's self interests to do that. Voting is unlikely to change that.