Think of it this way. How often do you make a royal flush? The answer is 1 in 64,973 hands using both hole cards.
So now do some pot odds
. Would calling 67 dollars to win $4,000 make sense with those odds? No. So simply trying to hit a royal flush for the possibility of winning the jackpot is not profitable in the slightest. If it was profitable, casinos wouldn't be doing them.
That being said, it doesn't mean you shouldn't play top suited connectors. You just shouldn't be trying to catch royal flushes and calling huge bets.
Also I've won two high hand jackpots in my life. Both with quad 7s. And I didn't play the 7s any differently until I saw I had quads. Because I knew the high hand was below my quad 7s and you have to get to showdown to win those jackpots, I check-called everything. Also my casino does hourly high hands across all the tables (only about 15 tables).