It's a natural course of action particularly as you get older. Early on when you have no responsibilities such as a mortgage, kids, care of people or property, you have more flexibility to take risks, travel and spread your wings.
I'd argue it's not about turning the opportunity down, it's moreso how you do it and how you conduct yourself. For instance, applying and going through the process when you have little to no intention of seeing it through, is a lot different from getting increased exposure what the job role actually entails along the process and realising it's a bad fit.
For me it's opposite.
When I was younger I needed the job I was applying for. So never turned down a job.
Now I'm at Work level where I can say no to offers.
When getting the job I'm at now I had an offer from a company before, I wanted to string it out to past the point I knew I did/didn't have an offer for the company I'm at now.
Time ran out. But they were quibbling over the wage I asked for. It was only 2k..which raise issue of trusting "but you'll get pay rises later".
I think i blew the recruiters mind (and his commission lol) when I said "no". He definitely thought the pressure would make me commit.
It was a hard choice but I had the confidence to say no vs join then leave a week later.
It was the right call.
If that had been pre coivd... I'd never have done that. It's only because I have a financial buffer, more experience and confidence that I turned it down.