Plenty of things become super hard to find after no one cares about it anymore. High profile cases aren’t like that but most things are not high profile.
Just because you can’t make something 100% perfect doesn’t mean you shouldn’t try. Locks aren’t unbreakable. Seatbelts won’t always save you. Your cloud service won’t always stay up. Yet we use and build all these things and no one has an issue with it.
And for all intents and purposes, if court records are meant to be hidden to protect someone’s future chance of success, by all means we should do what we can.