Think about it. Too many matches are already decided in fast time controls since the long format games are drawn. If you had a 30+10 or even 45+10 format you’d have more interesting games.
Six hour matches are a travesty. The games stink. The format stinks. Make it stop.
We all know that we will find better moves more often and make fewer blunders if we take a couple of minutes to think about our move. Tournaments awarding IM and GM norms and matches leading to the world championship MUST be played in conditions that allow the players to produce their very best chess.
Most serious players want to produce the highest-quality chess they possibly can, and improve their play and their understanding of the game. This can only be accomplished by using enough time to figure out what you think is the BEST move, not the first thing you think of.
I get a lot more satisfaction from winning a game by outplaying my opponent--achieving an advantageous position, exploiting it to achieve a winning advantage, and playing the endgame precisely to cash in the win, or coming up with a fine combination leading to a winning attack than I do from picking up a hanging piece that my opponent didn't notice because he was rushing through a fast time control.
Notice how nearly all the games you see analyzed in depth on chess.com are classical games. That's because there's more of interest in these games--who wants to analyze or study games where most of the notes would just point out mistakes and point out better moves that could have been made.
As far as more excitement and quick conclusions (instant gratification) bringing in more "fans" and more money--that's just grabbing for a few quick bucks. How many people still play the video games that were the biggest sellers ten years ago? Changing chess to become today's fad won't keep it popular tomorrow. Elvis Presley was the greatest musical sensation of his time, but how often do you hear his recordings today? Mozart is still popular worldwide 230 years after his death.