By contrast, it's visionary to be able to understand the full implications of a new technology that disrupts the environment in which we formed our ideas. In Tesla's case, not only did he understand the implications of that technology, but he actually invented much of the technology himself.
It would be no less remarkable if Gutenberg invented the printing press and then used it to print tracts explaining how his press was going to undermine the Catholic Church's monopoly gatekeeper status and launch an explosion in the rate and density of accumulated human knowledge.
(Some excuses may be made on the grounds of story flow and building a comprehensible universe, but that's weak sci-fi).