I don't robotically increase spending to match some published number, but if my expenses went up by that amount, I would do it w/o worry. I figure I may have higher than published future inflation (health care, taxes, pay for maintenance & repairs that I DIY now, unknowns?), so I'll 'bank' what I can now.
And if I did do for 20-30 years with only inflation adjustments, what questions would there be to ask? I imagine I would simply say 'I chose a conservative WR, one a bit lower than what would have historically survived the worst of the worst, so I stuck with it, and (making a hypothetical future assumption here) my path ended up not being as bad as the worst we've seen, so I was OK with inflation adjusted spending'. I guess it just doesn't seem remarkable to me, that's all.