Government contractors expensive tools are already heavily using open source tools. The whole log4j scandal that this bill is in response to is perfect evidence of exactly that.

It is not in the interest of 'proprietary' software vendors to fearmonger about OSS libraries. They too use OSS libraries just like everyone else does today.

It isn't 1995 anymore where a proprietary piece of software can run on a full stack of code written by the people who work locked away in a single building at one company. Everyone is using open source dependencies. There is nobody left that would benefit by demonizing open source libraries.