if FRB actually ends up being profitable, that means it has created positive values in the society, so that in of itself is not bad. though it does have problems: 1) it creates a asset owning social class, whose values increasing by owning shares in business (which are effectively debts). 2) when it fails (i.e. when banks suffer losses), it can fail spectacularly, again see 2008 for more details.
if FRB actually ends up being profitable, that means it has created positive values in the society, so that in of itself is not bad. though it does have problems: 1) it creates a asset owning social class, whose values increasing by owning shares in business (which are effectively debts). 2) when it fails (i.e. when banks suffer losses), it can fail spectacularly, again see 2008 for more details.