As with many things totally unrelated to this topic, simply abolishing the immediate problem is often not the full answer. That type of incomplete and lazy thinking can cause downstream problems that nobody thought about.
Is the "lazy thinking" here the decision to use PFAs in the first place, or the debate that you say is a simple binary of "go back to PFAs or not"? Did they even know what a "forever chemical" was back then? Granted, a more Marxist reading would be to conclude that the US, supplanting the French as the colonial presence in Panama, didn't give a damn about long term consequences other than the profits that would roll in once the canal was completed. (Similarly, the GOP didn't give a damn about the long term-consequences of nominating Trump in 2015--they just wanted to return to power.)
To illustrate:
In this model, Michael Palin represents the mosquitoes, quite annoying. John Cleese, as the colonizer, eschews any thought of a considered approach, instead responding with immediate and overwheming force. It is the Corporal Hicks model of colonial management--Nuke the site from orbit; it's the only way to be sure.
In the second place, are the people currently making the To PFA or Not to PFA "There are our only two options, pick one that we will use from now until the end of time", or are they saying, "Well we have this problem NOW--which of the two currently available but imperfect options will we use for the time being? When a better solution becomes available, we can revisit the situation."
Sometimes there's a tendancy--not just here, but everywhere--to use 20/20 hindsight in our condemnation of historical decisions. Sure, sometimes they may have not asked the correct questions--but it's also possible that they made the best decision they could
with the information they had available.
Or to put it another way--a way that may or may not be clearer, depending on the reader's cultural awareness--is this a matter of selecting from a box of Bernie Bott's Every Flavor Beans, or selecting something from the Whizzo Quality Assortment?
PS: Thanks to ongoing back issues coupled with yet another blown disc, this time in my neck, I am, at this moment, rather heavily medicated.
Thank you for listening to my Ted Talk.