Well, most software engineers aren't fortunate enough to be insulated from the impact of copyright infringement. The reality is that a lot of us--maybe not you personally, but possibly even your friends and neighbors--put food on the table via our intellectual efforts, and that deserves respect. Try to have some empathy.
> Google, Meta and Amazon would likely not face any significant business loss if all of their software (source code included) was publicly leaked
You don't know that. Granted, there are other barriers to entry in some markets, but stealing others' control and data planes would go a long way towards building viable competitors without having to expend the same level of investment.
You're cherry-picking the relatively small number of companies that support your argument. Besides all the software they've built, each of these companies has filed for and been issued mountains of patents (though not copyright, it's another IP protection scheme) and will enforce them if necessary to protect their business. I bet yours might have some, too.
You missed my argument: sw engineers are largely being paid for the labour we put in, and I am saying that we still would be paid for the same labour even if someone did legally (open source) or illegally have access to the software we build.
My company has a ton of patents (which are public) and cares about copyright deeply, but that does not mean that it would be significantly affected financially (other than potentially in stock price, which is an entirely different social aspect).
To give you another example, Windows source code leaked 10 years ago or so. Did it slow down Windows?
Just like authors (owners of copyright) aren't negatively affected if someone creates a copy they would never have paid for.