I don't actively discourage but I look at the individual situation and try to think about what would be best for the potential passenger for their routing, budget, timing and options etc.
And I try to be realistic regarding the QF experience (definitely understanding and making note that my experiences as a P1 differ to a fair degree in some regards to Josephine Average). So I take the experiences posted on forums on here, and from friends etc into account (eg: bad call centres, difficulty with rewards, extra fees for non status, etc) into account and give an honest opinion.
However I will recommend QF if it makes sense. For example earlier this year my sister wanted to fly to ADL from MEL. She's a QF Bronze but does have some points. It so happened for her dates that QF had a sale fare on of I think $109 and available for when she wanted. I also saw JQ had a $70 or something fare going, but I looked at the bag dees which was I think near $50 (! iirc) and so JQ would actually have cost her more than QF with included bag (and VA ad the times she wanted was more expensive still) so in that case I suggested she book QF in that instance.
OTOH a friend in PER needed t go to TSV for reasons, and QF was far more expensive than VA for her dates so suggested VA for her (JQ was also more expensive).
so these were instances of BFOD but also the benefit (as in for my sister the included bag sealed the deal).
By the same token for international I focus again on price, product and convenience.. things like FF loyalty (if there is one) is a factor, but one too should put a price on that. Sometimes it may make sense to suggest QF (though those are becoming less and less tbh) specially if there's a goal in sight.. but I'd probably suggest another carrier on price alone. It's all very individual for me based on the person's particular situation, needs/requests/requirements and working out what would make the best sense for them.
If people ask me about QF I'll be honest - specially over the past few years with all of the issues. I won't discourage per se, but try and be realistic and not let my relative good fortune due to status bias me too much.