100% agreed. Well, he "could" play the 2 - it just wouldn't be ideal. Good coaches don't play SFs at SG. They do the opposite - they play PGs at SG and SGs at SF, and SFs at PF. The idea is to get more quickness, ball-handling, and shooting in your lineup.
Of course, you always have fans who fantasize about having the tallest lineup possible. Tall is certainly a good thing, but not if one doesn't have the requisite skills for the spot. Goode's best spot (by far) is the 3. His second best spot is the 4. He could play the 2, but it's not where most good coaches will want to put him.
Similarly, Rodgers's best position right now is probably the 4. If he develops a consistent outside shot, you can start talking about him playing the 3, and yes, even possibly the 2. He does look to have good handles and looks pretty damn quick, although that's from H.S. tape. Whether he can do it at the college level is yet to be seen.