Maybe this is a bit out of the spirit of the question, but I think of a lot of "domestic" skills this way, like cooking, cleaning and home maintenance, and knowing specialized dressing and hygiene. This stuff requires considerable time and effort to be good at, and you wind up paying a lot to get someone else to do it for you. Covid has forced me to actually live in my apartment (instead of just sleeping and showering here) and I've increasingly learned that the housewives of yore were actually a lot like managers and process engineers - they constantly need to take inventory and think ahead in order to efficiently keep ahead of all the entropy added in regular life.

It might also be considered a "soft skill", but there are some communication skills I think are really valuable in a technical space; like knowing which diagram to make which will most effectively summarize the complexity of your system and is appropriate for your audience. The tools for constructing that drawing will change, but the activity of sketching for communication isn't going anywhere.