Here is an idea,Two people with similar intelligence,strength,speed,..etc whatever maynot have same domains/fields of expertise or choose it.They may not have same modus operandi either.Superman doesn't work like batman.Period.As if bruce would be like "Let's jump infront of a bullet to sheild a guy".
Also,the logic of using "Kryptonian blowing up" as a way to show how they aren't that intelligent is not even good.As if Humans can even begin to think about solve a problem that complicated as a sun eating a planet or core being destablised.Human of dc earth still can't solve ethical delimas regarding death penalty,ethical use of violence, supervillains escaping jail...etc .Krypton atleast doesn't have a bunch of lunatics blowing things up every other day.If and when earth gets to that point.People of dc earth would be dead.Plain and simple.I don't think even superman can change that.Since,His planet had a race full of em superpeople.