Laws and trumped-up morality are devices to control people for those who benefit from that control such as big corporations, some Supreme Court Justices, wealthy bankers, Wall Street shills in government and those at the top end of the pay scale including rich Republicans who care little for the suffering of those at the lower economic end of society.
Opportunism arises when it is condoned or defended as "the way things are and you can't do anything about it".
It's time for folkies to remember the original intend of "sing out", not the cop-out fanzine on today's market.
Remember that opportunism always comes from the top down. Activism on the bottom up is what's required.