AITA - My roomate stays up late on the phone

I have a 9-5 job and my roommate doesn’t, which means our schedules not entirely aligned. They often stay up until 2-3am talking on the phone. We live in a very quiet neighborhood and our rooms are directly adjacent, and as a result I can hear them very clearly. I usually have to ask them to quiet down and they do, but I nonetheless can usually still hear them. I often feel exhausted because of this. My job has been quite stressful recently and I feel like my wellbeing is plummeting because of these factors.

They claim that, because they’re already talking as quietly as they can, I should use earplugs or headphones to deal with it.

I want for them to finish their calls much earlier but their friends apparently can’t make that work. I feel like I’m going crazy with lack of sleep, am I the asshole?