As a CISO I am happy with many of the protections that Google creates. They are in a unique position, and probably the only ones to be able to do it.
However, I think the issue is that with great power comes great responsibility.
They are better than most organisations, and working with many constraints that we cannot always imagine.
But several times a week we get a false "this mail is phishing" incident, where a mail from a customer or prospect is put in "Spam", with a red security banner saying it contains "dangerous links". Generally it is caused by domain reputation issues, that block all mail that uses an e-mail scanning product. These products wrap URLs so they can scan when the mail is read, and thus when they do not detect a virus, they become defacto purveyors of virii, and their entire domain is tagged as dangerous.
I have raised this to Google in May (!) and have been exchanging mail on a nearly daily basis. Pointing out a new security product that has been blacklisted, explaining the situation to a new agent, etc.
Not only does this mean that they are training our staff that security warnings are generally false, but it means we are missing important mail from prospects and customers. Our customers are generally huge corporations, missing a mail for us is not like missing one mail for a B2C outfit.
So far the issue is not resolved (we are in Oct now!) and recently they have stopped responding. I appreciate our organisation is not the US Government, but still, we pay upwards of 20K$ / year for "Google Workspace Enterprise" accounts. I guess I was expecting something more.
If someone within Google reads this: you need to fix this.
I'm old. I've been doing security for a very long time. Started back in the 1990s. Here's what I have learned over the last 30 years...
Half (or more) of security alerts/warnings are false positives. Whether it's the vulnerability scanner complaining about some non-existent issues (based on the version of Apache alone... which was back ported by the package maintaner), or an AI report generated by interns at Deloitte fresh out of college, or someone reporting www.example.com to Google Safe Browsing as malicious, etc. At least half of the things they report on are wrong.
You sort of have to have a clue (technically) and know what you are doing to weed through all the bullshit. Tools that block access, based on these things do more harm than good.