Sure it's horrible optics and politics and yada yada but people should consider that the alternative (banning all trading as a member of congress) is potentially worse for open democracy.

"Murder is OK as long as it's committed in the town square" is a terrible policy. Lawmakers taking advantage of insider info, let alone upcoming regulatory changes, to make huge amounts of money while holding public office is straight-up antithetical to the purpose of being in Congress (the people). Want to make tons of money? Great, become a banker or a C-level or a lawyer in private practice, not a congresswoman.