When "they used to tell us we couldnt trust Wikipedia" it wasn't in contrast to random websites; it was in contrast to primary sources.

That's still true today. Wikipedia is generally less reliable than encyclopedias are https://en.wikipedia.org/wiki/Reliability_of_Wikipedia.

The people who tell you not to trust Wikipedia aren't saying that you shouldn't use it at all. They're telling you not to stop there. That's exactly what they told us about encylopedias too.

If you're researching a new topic, Wikipedia is a great place for an initial overview. If you actually care about facts, you should double check claims independently. That means following their sources until you get to primary sources. If you've ever done this exercise it becomes obvious why you shouldn't trust Wikipedia. Some sources are dead links, some are not publicly accessible and many aren't primary sources. In egregious cases the "sources" are just opinion pieces.