As a security engineer, nothing civillian-facing is ever 100% secure, it all depends how much resources your attackers have. When modelling your security profile, it's always a matter of "when", not "if" your widget can get hacked.
Most you can do is deter black-hats, but not much you can do against well funded state actors.
Except that most governments have migrated to digitalization of many services. Do you do your tax return in your browser or would you prefer to file endless paper forms and go in person and wait in lines?
True, but you have to pay your taxes anyway. Would you like to do it from the comfort of your home in whatever time you like or would you rather do it in person, standing in line for maybe hours and dealing with sour clerks?
Most you can do is deter black-hats, but not much you can do against well funded state actors.