Most of the Tesla recalls are just software updates that are done from home over the air
Some recalls have been software updates. There have been plenty (like rear camera harnesses failing, the media CPU overheating, rear seatbelts being incorrectly attached, faulty MMC modules, and the incident being talked about here) that have required hardware fixes.
It seems like that most of them are software, regardless of the metric chosen (number of units recalled or number of recalls).
So were most OTA updates or not? That is either objectively true or objectively false, not "pulling a lot of undeserved weight".
The article has a chart that sources NHTSA data.