We're not losing it 'to' anywhere. If you don't use skills, they atrophy, and when you need them again it takes time to knock the rust off, and even then you can lose some of your original finer points.

One easy example is manufacturing management, particularly of electronics. People think it's easy, but it's really quite intricate. I've worked for two manufacturers of electronic goods, and if a production manager leaves, it's very hard to find a replacement that has a clue. And if you're not a company that can afford both the scope and salary to pull talent internationally, it scuppers your ability to make things efficiently. It takes years to train someone up to be an efficient self-directed production manager.

There's also similar things like this in the trades - tradesmen are so heavily paid right now because of exactly this issue, skills forgotten by society. We went through a period where trades were looked down on and the skill pool atrophied. With only so many tradesmen and too much work, it's really expensive to use that skillset.