Were there 500 security updates a month after there were 200 updates? I have Linux Mint as well as Raspbian, and keep track up updates. Perhaps I didn't count correctly.
And no where did I say that MacOS and Linux don't have security flaws. There is no perfectly secure OS. If can be written, it can be compromised.
But to suggest that Windows is the equal of the other two, well, that needs a whole lot of proof.
Note that the '570 vulnerabilities' were across Windows and other software, I saw mention of AD, Office, Sharepoint, and Copilot in TFA.
So to compare apples to something like apples, you'll need to look at your authentication system, OS, productivity suite, email server and client, AI, and collaboration platforms including chat, file sharing, and media management.
I'm no MS fanboi - heck I replaced my Windows based NAS OS with ZimaOS earlier today - but props at least that they're doing something.
Now if they can address bloat, stop putting Copilot into everything, and fix weird issues where hardware stops working (but runs fine under other OSes) I'd feel a bit better about them as a company.