Yes, the authenticity vs flexibility issue was discussed several pages back. It’s not an either/or situation. You should be able to have both in a digital modeler. There are pros and cons to both. Neither one is wrong. Nobody is being forced to use the global input gain control. If you don’t use it, the amp responds like the original tube amp. If you do use it, it can be quite useful. Austin Buddy mentioned above he finds it useful to apply a compensation for different guitars. There’s another thread at the moment that is discussing using multiple inputs as a way to apply compensation for different guitars. There are multiple correct viewpoints here.