AITA for not personally informing my dad every time we run out of milk?

Hello Reddit. I (21) am currently living with my parents at home to save on room and board for college. I am a full-time student, work 20+ hours a week, and consistently contribute to household chores and tasks.

As a family we drink a lot of milk and go through it pretty fast. My mom (53F) has always been the one to get the groceries, but since I got my license in high school, I have as well. It is rare for my dad to get family groceries.

My dad (50M) is very picky about food, and for as long as I can remember, gets very upset if he doesn't have the right drink with his food. If we have pizza, he needs Coca-Cola, if we have any dessert, he needs milk. Growing up, when we ran out of one of these drinks, it would upset him. Sometimes he would slam the front door as he left, sometimes he would leave without a word. My mom was always hurt by it, and it always confused me. Why couldn't he just drink water?

Well it snowed bad this week but I was able to dig my car out of the snow and pick up some drink items. I got juice and some milk.

Fast-forward to yesterday. Mom got sick, but works remote. We ran out of milk as well as other items making breakfast and coffee, so I updated our grocery app. I get out to my car and it won't start. She was running a meeting, so I text to let them know I needed to take her car, which was fine with her. It's 9:00, and my dad is still asleep, he was off work.

It's 11:30, I've been enjoying a lovely day at work. My dad hadn't responded to any of the family messages, but I receive this text from him:

"Can you please let me know when you drink the last of the milk so I can plan accordingly for my meals?"

He hadn't acknowledged my car troubles or that I was at work. He woke up 4 hours after the rest of us on his day off, which is fine. I respond:

"Hello, good morning to you too. I understand that you're frustrated, mom or I are planning to go to the grocery store after work today. I made it to work safely and am having a nice day :) Hope you enjoy your day off”

His response:

"I'm sorry if that sounded rude. I didn't mean for it to. I would really like your help with that issue. I'm glad you made it safe to work, have a good day."

Fair enough. I followed up by sharing the updates I made to our grocery app. But Reddit, this is what I wanted to say to him:

"Thank you. I'm not sure what the issue is. I was raised to not cry over spilled milk. I am not responsible for helping you plan your meals. When we run out of my favorite drinks, I drink water and go on with my day because they are a luxury, not an essential to survive. That's more than most people have in this world, and I'm grateful. Are you?"

I always want to give the benefit of the doubt, and be open to the idea that I am missing something. But I feel like there's something wrong with this behavior.

So, Reddit, AITA for drinking the last of the milk and not telling my dad immediately, when he is fully capable of buying groceries himself, or drinking water when it's needed?