[TeMPOraL]

People brought up continuing education requirement, but since you keep asking about doing the stuff they do for work, outside work: lawyers and doctors generally don't, unless they're volunteering or giving out free advice (risky). But that's not necessarily because they don't want to, it's because those are service skills of limited utility outside regular work context.

Consider instead a car mechanic, or a carpenter. It wouldn't be surprising to find a mechanic doing some old car restoration work after hours, or a carpenter making their own trinkets or furniture. Unlike the skills of doctors and lawyers, those skills can be easily applied in personal life.

Software development is a funny trade, with continuing education requirements of medicine and law (though self-imposed, not regulated), but with work type more similar to carpentry or car repair. That is, unless you're working with some very unique hardware or very unique datasets, you can do the same type of work at home that you do at work (and quite likely of better quality, as you're likely to have better working conditions at home).