Quite right. Those hoses should have been replaced long ago, and usually are not too hard to get to to inspect, either.
You just discovered an opportunity to cut yourself some access ports
. Old through hulls, often the fittings require maintenance
or replacement, you need to be able to get at them, and wise to keep bungs tied to them, as well. It's good to turn the handles, too, once every 3 months or so, if you liveaboard
, or every time you visit the boat, if you don't. Some of us even do our handles once a week on a designated day, but that might be a bit of overkill.