Mostly because people quote numbers in contexts where they are misleading or straight up wrong.

For example, if you quote the reported deaths on VAERS as "vaccine deaths", it's not true, and it won't be no matter how much you quote it or how trustworthy the source is. It's still wrong because you introduced an error into the statement.

And if you still claim it's true and you reject criticism, that does make you look like a conspiracy theorist, or stupid, or both.