The voting shares give control over the company. If another company wants to buy a company in order to control its direction, they non-voting dividend-paying shares are worthless to them. They need voting shares.

And indeed, non-voting shares in a company that doesn't pay dividends seem worthless to me. And who decides whether the company pays dividends? Not the non-voting shares.

Non-voting shares could be fine, but they could also turn out to be a scam, depending on the wishes of the people who control the company.