We don't have to. By generally accepted rules of engagement the totality of investors think that Twitter is worth 30% less than what Musk is offering. That's

We don't have to. By generally accepted rules of engagement the totality of investors think that Twitter is worth 30% less than what Musk is offering. That's the difference between Twitter's market cap and Musk's very tender offer. There's no better way of asking investors how much they value a stock than by allowing them to bid in an open market.