Airlines can't afford Boeing 737 Max safety features?

737 Max cockpit-where it happened

The two crashes of the Boeing 737 Max planes are being blamed on two safety features that weren't installed on these planes because they cost extra but could have saved the lives of all those passengers that were killed. And neither was mandated by the FAA. Is this like when you buy a new car and the sales person asks, 'Would you like a moon roof, great, but it costs extra.' And you reply, 'Nah, don't need it.' This fully qualifies for the 'I don't believe it' category. I seriously cannot believe an airline would say no to something that would protect the lives of its passengers just because of costs. But, then, I have been known to be naive at times. Boeing says it is working to make the 737 Max safer. Nice, but no consolation for the families of those who died on Ethiopian and Lion Air flights.