why is d4 more popular than e4

is it because e4 is scared of the sicilian

I'm pretty sure e4 is still the more popular opening choice in general.

Well, d4 is the more "modern" approach. This opening ofter leads to very closed , dynamic and "strategic" positons. While e4 often leads to Tactical Openings , usually gambits (Kings Gambit,Elephant Gambit,Latvian Gambit etc) But that dosen't mean that e4 openings could reach in a dynamic and closed positions. Example: French Defense and Some variations of sicilian defense could lead to closed positions. I still think e4 is better even tho is stated that both are equal. Take a look at the diagrams. Have a nice day and good luck in your future!

hello

e4 wins by test

I use the 'English', which is c4, then bring the knight up under it. It's a good opening as far as I'm concerned.

I think I see E4 a lot more than D4. E4 strikes me a being sort of a  move a scared person would make. Sometimes a new opening is more interesting and when you're playing white a little advantage.