First off, I have been using solid copper TTSX bullets for a number of years for deer and elk but am absolutely against "mandates"... I stand firmly in the corner that everyone who hunts should find an appropriate hunting bullet that you can shoot the most accurately and consistently in order to maximize effectiveness and ensure ethical hunting. Lead bullets are a softer metal so open up faster/more reliably and thusly provide greater effectiveness versus harder copper bullets, especially at slower velocities (hello long range shooters?) do they want us to injure and not-recover more game animals?
Totally agree - I've only hunted big game with TTSX.
"They" want you to stop hunting and get rid of your guns.
Te occidere possunt sed te edere non possunt nefas est