No-one walks into a £200k job having done nothing in the years beforehand.
I started working professionally straight after uni in 2002, so this is my 22nd year of working. Both my maternity leaves were 7 months, and I've always worked full-time.
The hardest I've worked was probably the first 10 years, learning the profession, training and going into industry. In the early days the hours were long, and I was often away from home. Didn't have DC until after 35, due to meeting DP late, but also wanted to get to the C-Suite before stepping away for breaks, as it's easier to get back on at the same level if I'd needed extended time off.
Now, I'm not paid for time worked, I'm paid for the value add and delivery of objectives. Some days that means I work really hard for 4 hours a day, some days I work really hard for 12 hours, logging back in after DC have gone to bed. I manage my own time and generally work my time around DC needs, so I attend all school events, whereas I wouldn't have had that flexibility in the early days of my career.
I wouldn't say I'm any more or less deserving of a high salary than others in different sectors, I just happen to work in an industry (finance) that pays very very well, increasing as you get more senior.