Your Dudeness,
I am not debating your experience of flying in and out of VFR airfields in 'Schermoney'. Nor do I want to get in an argument about who's more knowledgeable.
You're right, some WX-values can change rapidly over a given distance. And - believe me - I have my share of flights that started or ended with a VFR-portion ('Z-' or 'Y-flightplans', if I remember correctly), even if it's a long time ago and I'm glad that I don't have to do this any more on a daily basis.
The point I'm trying to make is merely this: far too many pilots press on in marginal weather, lowering their limits as they go along and the poor passengers behind (or next to) them or the non-flying public on the ground are suffering the consequences from their marginal judgement.