Ofcourse they are, that’s exactly why they are called just that, “bound-tries”: they bind you - and others too - so people know there are limits.

Does your home have a front door?

Does your shower have partitions to keep the water in?

Is your personal handbag under your control?

Do you have secret passwords for access to your accounts?

Do I still need to convince you boundaries need to exist and to be maintained at all cost!