The only reason I think this matters is their finances are a lot different than a tech company. You are correct that Tesla is currently priced like a tech company though, so maybe I'm way off!
(This only matters for valuation sake, a classic tech play can achieve profit margins far higher than a manufacturing firm.)
"Technology ("science of craft", from Greek τέχνη, techne, "art, skill, cunning of hand"; and -λογία, -logia) is the collection of techniques, skills, methods and processes used in the production of goods or services or in the accomplishment of objectives, such as scientific investigation. Technology can be the knowledge of techniques, processes, and the like, or it can be embedded in machines which can be operated without detailed knowledge of their workings."
You can argue that that isn't accurate, but I don't see how you can argue that the categorical statement "tech companies have server costs" follows from it (I can't even find the word "server" on that page, or on https://en.wikipedia.org/wiki/Tech)
[1] https://www.tesla.com/gigafactory
[2] https://www.tesla.com/blog/panasonic-and-tesla-sign-agreemen...