You are free to believe what you want, however truth is nordvpn has many leaks unlike other vpn services.
A little google session will show you the amount of login details leaked and that are still active, and in many cases nordvpn's password is active too.
Also some accounts have comprehensive passwords from what I have seen.
Nevertheless, sure believe what the company publicly notifies the general public.
Of course you are also free to believe what you want, but in my opinion this is all just speculation. NordVPN has only had one breach, that did not leak any user info. Knowing how aggressive the VPN market is, you don't think the competitors would have jumped on the opportunity to reveal that NordVPN had their user info leaked? I highly doubt that, there would have been a massive scandal if this had happened.
Also, you can find many login details for Netflix, ExpressVPN, Spotify ect., does that mean all of them have been leaked as well? I think my theory of credential stuffing is more plausible.