I don’t think so. I have no credentials in electrical engineering, but my understanding it that when we touch the strings, we aren’t grounding the pickups, we’re grounding our bodies, stopping us from being a big antenna.
The way I’m wiring is the only way I can think to get the bass to work mono with a normal cable and stereo with a stereo. If they share the bridge ground which is wired to the sleeve of the jack, it then means the hot from one pickup needs to go on the ring. That’s fine when running stereo, but if you insert a mono jack into the socket, it will short the pickup that is wired to the ring and sleeve.