This is a constant tension and will never be completely resolved, but BFRs often force experienced pilots to fly with fairly young CFIs.
Still, if that young person went through all the training and passed the vetting process, he/she should be accorded to credibility implied by the rating until proven otherwise.
Anyway, the first 30 minutes or so of a BFR I think is better handled, "We know what the regs require, and we'll certainly cover that, but --- what type flying do you do, what do you and I need to work on?" etc.
Sometimes the approach is "I don't have much experience in this airplane -- how about you talk me through your pre-takeoff checklist [or whatever]?"
The focus should be more on a cooperative endeavor -- not an exam or a hurdle to simply get over.
That said, if I get a know- it-all who wants to flash his logbook and give me grief we will quickly part company (that has not happened -- yet. But I'm 46 and so probably get a bit more credit than I deserve)
Everyone can learn something, and if you think you know it all, I certainly don't want my name and number in your logbook when the NTSB goes through it after the inevitable accident.