I am not saying that everybody needs to check code before using Bitcoin. My point is that nothing stops anybody from gaining the requisite knowledge to review code. Since the code is open source, you can review it if you have the knowledge. Unfortunately, not everyone has the skills, so we depend on the publications of others. So we benefit from the voluntary work of others since we enjoy a safe, decentralized system.
If you are in IT, you can try to review code but with me, I am not in IT and I will not spend my time to learn about programming just to review codes of Bitcoin wallet soft wares, firm wares before I use them.
As I talked about it in my previous post, if code reviewing is a mandatory task to do before using Bitcoin, it's a very big barrier prevents Bitcoin from many people. The majority do not know about IT, don't know about programming, can not review codes, and such barrier will only keep them away from Bitcoin.
It's more fearful if there are security issues reported by community, from reviews or reports, but the company teams ignore all. It's what Coldcard team did since years ago and the hack is only a consequence of their security ignorance even they got support from community.