For some people, yes, however, it depends on the individual's situation. Not everyone has the portfolio or finances to play at the big end of town. For those that do, it would be a waste of time for sure.
LoanProfessional.com.au is not a great domain, but it is something that exists and my experience has been that sometimes you can get a sale on this type of name. Once you've got some customisable email templates set up, it doesn't take long to research and contact potential endusers. For me, if I've got $20 in a name, I'm happy to spend a bit of time doing outbound marketing - it beats watching TV. If I'd let all my suspect domain purchases expire without attempting to sell them I'd be thousands of dollars worse off.