Except a sailor on a Longboat is not climbing rigging at all, and neither is a sailor on many of the Spelljammers or a dozen other examples I would use that background for. Further, I don't know what the 3 skills for a sailor are, but it is a safe bet I could come up with an example that would have warrented other skills or other feats.
Also strength is the ability typically used for climbing checks, not dexterity.
Rollibar, the ships mage in the Drizzt novels for example is a sailor, and if I was his apprentice the magic intitate and +2 intelligence ASI would be right on point (maybe with strength as the +1 for climbing rigging or maybe a +1 Wisdom for the time I spent looking at nautical charts), but without Intelligence and Magic Initiate I can't do that. No other 2024 background would remotely match the backstory for that character and the Sailor abilities would not generally match the backstory.
As for Scholar, it is not one of the 2024 backgrounds, so that is not a good example to use. If you want to build a scholar you need to use an older background.