Look at the difference in trajectory and amount of profit margin and market cap (<5% and $20B versus 30%+ and $217B).
Tyson deals with the laborious and dirty work, as do McDonald’s franchisees. McDonald’s probably likes where it is, collecting royalties for “quality” control and real estate appreciation.
Also worth noting that assuming I'm reading this correctly it doesn't just impact McDonalds but everyone who has bought beef since 2015.
I do wonder at what point does McDonalds vertically integrate and process the beef themselves.