Politics aside, the omega6:3 ratio and PUFA content of tallow is favorable.
Arguably the "healthiest" cooking oil is olive oil. If we're looking at just the fatty acids though, replacing SFA with PUFAs is a stronger predictor of lower CVD and all-cause mortality.
That sort of overwhelms the omega ratios. As I understand it, both fish oil and (fresh) flax seed oil are still better than tallow.
With RFK's dismantling of good science, politics can't be put aside, as his reasons are essentially "because I said so".