That's not a valid argument. You're the President of the United States. Your job is to be knowledgeable (again, knowledgeable, not be an expert) on many things to be able to make correct decisions with the information given to you by experts. You don't get to fall back on "I'm just a businessman" so you can hide your ignorance and inability of making global and strategic decisions in the best interests of the US (and by extension our allies).
It comes with prioritization. I don't think that knowledge is important for the presidency, really. If you look into it, most politicians (even ex presidents) really aren't too bright, they get elected by charisma/sound bytes alone, then rely on competent cabinet members to do all the hard work.
I wouldn't think Trump's presidency would be any different.
If you prioritize experience/knowledge than certainly Hillary is an obvious choice.
I have fewer problems with a resurgence of cold war bully tactics with Russia and the US staring at each other and seeing who flinches first, as they have been doing for decades, than I have with someone who would openly advocate for the direct targeted murder of women and children.
Fair enough. Personally I don't mind targetting friends/family who had knowledge of terrorists in advance and did nothing. But a lot of people feel like that's a moral boundry we shouldn't pass.
Does Hillary's assassinating world leaders cause any moral issues with you, or is it ok?
http://www.foreignpolicyjournal.com/2016/01/06/new-hillary-emails-reveal-true-motive-for-libya-intervention/
Things like that scare me more than Trump pissing off some other countries.