You’re not wrong you’re just missing a few tidbits of info. Like the separate ground wire the dedicated line offer. Power Plants can’t and don’t affect ground. So a clean wire feeding straight from the sub panel and ground stake makes a big difference. That alone’s reason enough to do it. Secondly, it helps to have the heavier gauge wire we recommend as 10 gauge is rare in homes. Bigger pipe, easier for the Power Plant to grab current without restrictions.