have worked with people doing this and it can be quite annoying working alongside someone who has no interest in being cabin crew and just uses it as an opportunity to chat to flight crew about their next move. While I appreciate everyone has a goal and its great to have ambitions, bear in mind some people have chosen cabin crew as their career and take it seriously.
I agree, but not everyone is the same. I became cabin crew knowing that I wanted to one day become a pilot. I still give the job my every effort and I got everything out of the role I could including a promotion to purser. I have learnt so much from being cabin crew which I hope will help make better decisions as a pilot. There are some CPs and FOs who I would love to see spend a few weeks as cabin crew.
Do it, work hard, show some respect to your peers and give the job your full attention. Your work ethic won't go unnoticed and who knows, your airline might recruit you as a FO in the future..