Plus, the Skins FO is a big fan of analytics, so I'm willing to bet these aren't just hunch moves by DQ. Someone is running the numbers and showing exactly the odds you just posted - Go 50/50 on TDs vs go 4/4 on FGs. Or the specific play success % for each individual call. They have to know that going for it on 4th and 2 is probably the higher percentage than kicking a 49 yard FG with the guy who can't stop fussing with his own hair. (no offense to people with OCD intended). Point is, your post saying "what's the better odds"? is exactly what they are doing, and at this point I'm not second guessing anything they are doing, they are all f***ing magic!
He's likely also taking into consideration that a missed FG is huge loss of momentum that actually gives the team the ball at the spot, whereas a missed 4th down gives them the ball at the LOS (incomplete pass) or farther from the other teams end zone on the case of a run/pass just short of the 1st down yard line. Making a 4th down conversion is a huge boost to our momentum, which is sometimes also worth the risk.