Lensing is a bit more than mere bending -- much more has to be in place.
But it wouldn't surprise me if real errors are being made. Not at all. Just haven't had the time or inclination to look into it. And my capacity to do so if I wanted is rapidly diminishing with time.
These fields are as corrupt and ambition driven as anything else.
I'm a neophyte at chemistry, but I think of what I did learn about reactions, elemental geophysical and atmospheric abundance. Then I imagine all the stuff I saw in the advanced books, which looks like simply much more of what I learned in HS and college. Then I imagine the trillions of molecules or more in a gas or sea or room or whatever. What can they really know about the detailed chemistry of such environments? Probably more than I can imagine, but not enough. Not enough to grasp all sorts of "emergent phenomena" I would guess. Most of the chemistry, and physics and biology for that matter is based on experiments utilizing highly rarefied and controlled situations -- as simple as possible.
They've no idea about the coiling and uncoiling of proteins within the cell environment. Which is essential -- they may have found the sequenced formula for these proteins. But the facets they reveal and conceal through this twisting and winding are all about which of these putative instructions are available for 'expression.' One of many examples.
One day they might give up on trying to figure out unsolvable problems like that when some old granny from Georgia explains to them that fresh air, dancing, singing, sleeping it off with a good diet, and generally having a good time within a natural environment of trees streams and beautiful sights will keep those protein coils alternately wound and unwound in the optimum way.
When they realize such behavior might also effect sunspots, the solar wind and neutrino flux, they'll really be onto something!
specialists here