[naasking]

There is no conflation. "One person one vote" was a principle formulated to ensure the will of the people is known, and that entrenched powerful interests cannot undermine this will by having more voting power than the average person.

"One person, one voice/account" has a similar rationale behind it. Technology is a force multiplier. The human mind gives more credence to things they hear/see repeatedly and from multiple different sources. This is a somewhat robust heuristic only when they are actually different sources. The "powerful interests" here are those with the knowledge to broadcast their message widely under multiple different aliases. This is why social media is such a problem.

If a particular platform is shown to be important to democratic discourse, there's a compelling argument that that platform should have rules ensuring the authenticity of the people's voice.