I speak only for myself but, achieving high scores IS what makes pinball MORE fun.
Learning to "dead flipper bounce" & pull off "post transfers" changed my pinballing life. Once that revelation sank in, I then started to try more advanced stuff like "live catches" and "drop catches" although I'm not particularly great at those. "Alley passes" are easy & fun on certain machines. "Tap passing" on the older games is a thrill for me & generates some raised eyebrows from my peers.
Every time my play stinks now, it's because I've slipped back into a bad habit. (Flailing away with the flippers.)

Like others have said, watch the youtube videos, then try it yourself. But you have to decide that you're not worrying about the score while attempting these maneuvers in the beginning. It's about repetition until you can do something without having to think about it so much. You'll be amazed at how much your play improves without a lot of effort, and you'll have even more fun due to longer ball times between drains.