I agree too that views should be changeable and not set in stone, that we should be open to new ideas and thoughts in general. This does not mean that all new thoughts and ideas will be adopted.
You can accept things without necessarily agreeing with them. As far as I am aware we are still allowed to form and have our own opinions and should not be berated or sneered at by others with different opinions.
Personally I don't agree with stamp duty, but accept it.