Imagine a world where one county underfunds infrastructure because of 5G health fears, but another country does not. Wouldn’t the county that implemented the infrastructure have a competitive advantage?
There are two angles of potential for who benefits.
1) Misdirection. Someone trying to muddy the waters of blame related to SARS-CoV-2. In that case, almost anything other than the truth will be useful. Chaos of information is ideal if that's your goal. Try to shatter the consensus. Unleash, entice, the people prone to extremes on conspiracy theories, let them do the work of spraying non-sense everywhere. Moderately effective and at very little cost, all they require is a gentle nudge at a time like this.
2) Degrade competitors when it comes to their deployment of technology (5G in this case). A small erosion is a large potential benefit over time. Once you have an advantage, keep pressing it forward.