As someone who has done this, I can tell that it's not easy to justify. In my previous company, there were two teams, one in India and the other in US, working

As someone who has done this, I can tell that it's not easy to justify. In my previous company, there were two teams, one in India and the other in US, working on a project. Each team had a scrum master and a daily morning scrum call. The India team was expected to attend the US team's scrum call as well. This made no sense to me as I already provided updates in the Indian scrum call. So I made it clear that we should either cancel the Indian scrum call or we should not attend the US one. But I was a relatively junior developer and senior engineers were complying despite disagreeing with the arrangement. So, the US scrum master escalated it as far as he could take it. I did not back down and defended my position with senior management as well. It was a fun filled week though. Every day the US scrum master would think of a new silly reason to escalate my absense and I would have to counter it. Eventually, the practice of attending both scrum calls was dropped.