Chit happens ...
Also, its a never a bad idea to leave the engine hatch open on the first launch of the season, just in case some of the plugs/seacocks/fittings/hoses loosened during winterizing are not tight and spewing water into the bilge! Better to do a visual in that area than be “unpleasantly” surprised.A friend of our son in law bought his first boat years ago. He launched it and noticed it was taking on water. He panicked. Did not know what to do. He called our son in law who happened to be boating with us at the time. First thing he asked, did you put the drain plug in? Guy says the what? Duh, that was it. I'm sure he's not the first nor last to pull that stunt. Even seen experienced boaters get busy with other stuff and forget the plug ...at least they know what to do when that happens.