Devil's advocate for a moment... the definition of a broker is "a person who buys and sells goods or assets for others," or it can mean to "arrange or negotiate" a deal or plan.
How is a miner not a broker then? They accept transactions and then place them on a blockchain by performing some kind of work. Sure, at the moment few if any cryptos are definitely securities, but what is going to happen when a company creates (for example) a wrapped SP500 token? A "traditional" broker can't just trust anyone to record a transaction, there is a lot of regulation.
Will there be a class of tokens that can only be mined by people who can do KYC on them? Why is a miner exempt from caring about what transactions they accept?
How is a miner not a broker then? They accept transactions and then place them on a blockchain by performing some kind of work. Sure, at the moment few if any cryptos are definitely securities, but what is going to happen when a company creates (for example) a wrapped SP500 token? A "traditional" broker can't just trust anyone to record a transaction, there is a lot of regulation.
Will there be a class of tokens that can only be mined by people who can do KYC on them? Why is a miner exempt from caring about what transactions they accept?