No Tides

Why can't oceans just flow, like a gentle river stream. instead of crashing into shore and then going back for more. Is it just me, thinking out loud, after a long and vivid dream. Couldn't it just trickle to the edge, without a noisy and almighty roar... Ships and boats, would never be tipped over and sunk Girls on the shore, would rarely see, a ripped surfy hunk. No whitecaps to look at, no tides to ruin... sand castles on the shore. Precious marine life swimming and crawling...wherever it wanted Not getting tossed all about... they'd be happy But it's all too challenging to function...oh dear ... We still need the orbiting moon to be there... That's what my dream forgot to fully figure out... until just now.