But aren't there other casinos that, even if they trace that their users are using a VPN, they don't seem to consider it even if the user has provided or is willing to submit KYC,
and they still don't allow their players to make a withdrawal transaction?
It depends on the casino's policy. Some Casinos are soft on VPN usage, while others are not. Problem is, there is no clear-cut line between people who use VPNs for good intentions vs those who use it to bypass restrictions or to cheat.
And even when there is KYC verification done, things like proof of location become quite a challenge or the IP address the user my have used to access the casino might have been flagged a while back as an abuser.