I can’t tell if you’re being sarcastic but yeah, they have been dying of lead possessing since like forever. In the 90s, when the condor was something like 20 animals alive on the planet, organizations like the San Diego Zoo, started to push for the outlaw of lead ammo. It took until 2019 (apparently) to finally outlaw it here completely, yet the animals are still dying from it.

Lead poisoning from ingestion of lead ammunition is the most significant threat to condor survival, but other factors - including ingestion of microtrash and electrocution - also present challenges to condors as a species.per the national park service

Of the 213 condor deaths in the wild between 1992 and 2020, half (107) were due to lead poisoning, according to USFWS. according to us fish and wildlife

To answer your question why, people just don’t give a shit. Apparently lead is preferred because it’s softer than steel, and deforms in an appealing way for “hunters” and “gun enthusiasts”.