Yeah I agree with you 100% here, it must be so frustrating.
Luckily we have been able to manage DDs noise sensitivity so far (and it seems to be limited to shrieky high pitched noises also, rather than loud noise in general, which helps a lot) but I can see it getting worse and ending up in a similar position, where its almost impossible to go anywhere at all.
DS's problem is also with high pitched, piercing sounds. It, along with his other ASD traits, is limiting, yes, but we're a glass half full family and I have always done my best to push him where appropriate and protect him when needed. We can't do reasonably priced family resort holidays, but have been able to have 1, which although expensive was brilliant. Normally we holiday here, beach holidays with water activities like kayaking, pedal boarding and sea fishing. His father (lives abroad) does the same when he visits him. He has been skiing with the school, which he loved and my parents have taken him abroad to quieter resorts full of mostly retired people.
Things have actually got better as he has grown older due to an excellent SENCO team at his school who provide brilliant support, quiet space and training and coping mechanisms, so please dont let my posts make you despondent or pessimistic about your DD's future @VulvaPerson.❤