My wife and I have a 2.5 year old. Since she was born, my wife has been on various trips with either friends or her family (who live overseas) with the child, while I stay home at work, or to catch up on the holiday later when I was able. I've never complained or denied that she should go and enjoy herself.
I recently brought up that I would like to attend a seminar in Japan next year (for a hobby of mine, not work related). It would entail about 5 days away including travel. I have been to such seminars before, but not since the kid was born. My wife immediately said that I could go, as long as I organised my family to help her with the kid on the days I'm away (Wife is going back to work full time next year, kid is going to childcare daily), and that organizing help was non negotiable, that I couldn't go if she was left without aid.
I feel this is unreasonable.
On the days the kid goes to childcare now (wife working part time this year), I stay home, get the kid up, dressed, fed and to childcare, starting work much later then I usually do. I see no harm in her being able to do the same thing for a few days. Her work time is as flexible as mine. How can I approach this to avoid getting into an argument about it!