Analysis is important in gambling it is the way gamblers predict thier betting moves and for it works it will guide gamblers in casinos and sport bettors.
Yes, moreover, analysis helps ypu more to win in a game every game has a bot or a system working however with analysis or analyzing before making amove is a big advantage towards to the system or your opponent much more it will works in a p2p games.
Well it's necessary but its not as important as knowing how to practice self control. In p2p games perhaps, like poker but most gambling games in casinos puts you against the house where analysis takes a back seat to luck.