That's quite an assumption, because i (and many others) don't believe it is to be taken at face value. It looks like a ploy of Elon and others to catch up to their main competitor (openAI). It's known Elon hates openAI[1] and is competing with them. He also provides the majority for the organisation that published the letter. Some people on the letter are well meaning but misguided.
[1] https://www.semafor.com/article/03/24/2023/the-secret-histor...