I think it depends on the RSU & ESPP and how real /secure they are. The ultimate goal is to safeguard existing and future cash streams, your sallary and stock.
I worked at a bank during the cc which is active in HK. We survived but our competitor, The Royal Bank of Scotland went under. I knew the old guard at the RBS when the bank actually managed risk properly. They built a bank on the foundations of prudential lending and took lucrative stock positions as part of their pension pay out. The children that took over couldn't spell risk...the only word they knew was sell. My point is that the old guard got slaughtered. They held extremely concentrated positions in the bank they spent their careers building up, that they thought would never fail.
As some people have alluded to, even when actions are not against the law, they can irreversibly hurt your reputation and buying puts might come back to bite you due to future unknowns like office gossip, IPO disclosures / DD or job promotions etc. The ultimate goal is to safeguard the future cash flow...I would be wary of being too concentrated in one firm, where you also work.