Grace you're so young, yet you have to use religious judgement. I am a servant of God, so is Mary. Don't be nice to your enemies and God's enemies. Don't offer them love and friendship.
I was hoping not to have to explain this to you, and that you would have figured it out yourself. Mary Unknown7 has been streaming a capella for many years already: she doesn't need an accompanist. Then I chose you to accompany her because I want to marry you. What you're doing is jamming to her a capella stream, so technically anyone can accompany her, as they have been doing so already. The difference is that I endorse you. The numbers are much greater than what you see in the stream, and what you have seen in front of you on stage. But when you abandon Mary in favor of some other gig, other people are going to pick up the ball that you dropped and run with it. People from your country, and other countries. They could be excellent musicians, because there will always be someone stronger. They will take the audience that wasn't important enough for you, and your ambassadorship becomes just another vanity. A pedal that you don't really use.
I suppose each gig has its value and you have to honor your commitments. Which makes it worse when you intentionally schedule a conflicting show, regarding Mary as the disposable one, in favor of performing for your enemies and God's enemies. I have to forgive you, but your competitors don't. Other countries don't. There will always be someone stronger, but Allah is the Strongest. Ya Allah, please bless and protect our work.