Never turn down your first command.
I don't agree as it is entirely subjective to each pilot when facing these decisions. I've turned down 2 jet command opportunities to carry on my chosen career path and I made the right choice (for me) both times, no question.
If you want to move airlines periodically throughout your career or feel your current mob aren't a one-stop-shop then fair enough but jet hours are unfortunately more relevant than TP command hours if you want to work for anyone other than a regional TP operator. If the crap hits the fan on a global scale for the aviation business, and you are relying on TP PIC time to get you a job, then you will be up against an awful lot of people with the same or possibly more relevant hours chasing very few openings. I'd argue then it's a case of sit and wait (years?) or open your wallet and pay for a TR on a jet.
A good situation? No, a command of any sort SHOULD be more important than any form of P2 hours, but this is the modern aviation job market, and I can't see it changing unless EASA imposes USA style minimum experience requirements for a medium jet F/O. It won't ever happen.