Jellei, you are confused a bit. Most likely "is going" is a better translation, but "goes" should be accepted as well. How would you translate " Każdego dnia ksiądz IDZIE do pracy i wykonuje swoją pracę"? May be - "Every day the priest GOES to work and does his work" - would you argue? So "The priest goes to church" should be a valid translation.
But this sentence doesn't have anything about 'every day' or anything like that. I wouldn't argue about that sentence you gave, but this one doesn't have that additional context.
Generally, Verbs of Motion have numerous nuances and if we take into account every possible interpretation, then we won't be able to teach anything.