Sorry, but you're incorrect.
You misunderstand what wikipedia is saying, which is not your fault because it doesn't say enough of the right thing and too much of the wrong things when it comes to certain topics.
"They also make the law,
to the extent that their decisions in the cases before them become precedent for decisions in future cases.[15]" - from the link you cite.
Your source is referring to stare decisis - which is judges choosing to uphold precedent. That only influences the jurisprudence of future judges and future court case considerations. Supreme Court and all courts in US do not make 'law'. That is the province of the Legislature. The courts can only enforce existing laws. That is and has been the central component of our separation of powers as the Constitution outlines specifically and explicitly. The province of the court is to review law, find it unconstitutional if it doesn't fit in with the general tenor and spirit of the instrument, but they have no capacity to make law because only representative bodies (Congress/Senate) has that power.
But in reality, I guess your thought is correct in the sense that their actions and judgment has the effect of law, but not in the sense of 'making' law since they cannot originate any original ideas of governance, but only stop, allow, or prohibit certain actions from existing legislations which have been brought to them by a party seeking redress of grievances.
Wikipedia is misleading, especially when it comes to potentially confusing lines of thinking like jurisprudence and intricacies of legal systems.