If a man collapsed in the line at SeaTac - that is not the airlines’ fault. They comply with ADA. They provide wheelchairs, etc. The airlines are tenants of the airport. They lease gates. They lease facilities.
Blaming airlines for how the airports are run is like someone in your car blaming you for the condition of I90 or I405, and telling you that you need to fix it. Just because you use a public accommodation, doesn’t make you responsible for its condition.
SeaTac runs the security program, using TSA personnel. The City of Seattle has failed, if people can’t get through security in a reasonable time, or are harmed by the process, not Delta. Not Alaska.
Rest assured, airlines aren’t happy with how many airports are run.
Do you think KLM is happy with Schiphol right now? Delta with Seattle?
Every single airline in the world with Heathrow?