Nobody's saying do something dumb to make him happy. Everyone's saying stop doing dumb things to make veterans happy (see Bell, Howard, Foye, Jefferson and Millsap).
But with favors and Kanter we're not talking about clearly inferior players getting time in front of them, we're talking about Al and Millsap, who are "good" players who have demonstrated an ability to play against other starters and put points on the board. We've seen several times this year that Favors and Kanter sometimes struggle to score. That's not just a small issue. They need to prove their ability to score before we could even begin to consider playing them over Millsap or Al.
So that's what I'm talking about. Right now it doesn't make sense to not play Jefferson does it? Do you really feel like you could justify playing Jefferson 10-15min/game, especially if the Jazz aren't scoring in his absence and are losing games?