You can set up to lock up your account from Day, Week, Month, or Permanently. If you lock the account, you're not allowed playing into the casino depends on the type Self Exclusion you choose.
No multi-account, no playing to the casino!
This is a different feature compared to what OP is stating. Self-exclusion just disallows you to get inside the platform for a certain amount of time, and at that time-frame you are not going to receive any promotions, updates, news, or whatever that comes from the casino tempting you to login and deposit. That 'responsible gambling' feature just limits your account in a way that you will not be able to deposit anything after a certain threshold in losses or deposits in the account is reached. You can still visit the casino, you can still check what games are there and what's happening around, but you will not be able to play since you will literally not be able to deposit for a certain period of time, or until that feature cools down/resets.
It's a lot more flexible and a lot more appealing than self-exclusion wherein you will literally forbid yourself into logging in on the site. IMO self-exclusion is not the way to go; you should be able to let go of your bad habits slowly over time and not in one big dump as it may even trigger you to visit the casino once more and do even worse than before (relapse). With the feature OP is stating, it teaches you how to be a responsible gambler while still enjoying the games that you love.