30+ Bitcoins? who's him? I think you're refer to Laszlo Hanyecz where he spend 10,000 Bitcoins for 2 pizza and he was not disappointed for doing it, so why you should care with it?
It's your choice if you want to pay with BTC or not, but I believe there's a time where you will convert your Bitcoin to cash because you will need that money in the future, you can't just hold it and not enjoy what you've accumulated so long.
I agree with you. It wouldn't matter whether you spend your Bitcoin directly on whatever you wanted to pay for or you decide to convert to cash and still spend it as fiat, either way, you are still spending it. I don't think this kind of sentiment should be attached to Bitcoin spending because we however know that you cannot hold them forever you still have to spend them one way or the other.