Because it's almost impossible to differentiate between a person posting a tweet and a bot doing the same. There is nothing humans do on Twitter than bots cannot automate.
How was Musk's offer - a public disclosure with few conditions or contingencies, made in bad faith? At face value, it does not violate basic standards of honesty or appear to deliberately mislead.
If someone offers to purchase your home or other property, the decision to accept that offer lay with the property owner(s), not the municipality, county, or state who may or may not consider impact to humanity. In what utopia do you think we live?