Overall not a bad idea in a lot of aspects but todays NBA is full of stretch 4s, even we have one and neither DeMarcus or Chuck Hayes can guard them.
I hear this said a lot, but I think its one of those urban myths that just gets repeated around in circles and nobody ever stops to really analyze it.
Now depending on how far out form the hoop you have to go to be a stretch 4 -- i.e. LaMarcus Aldridge is a jumpshooting 4 but I don't think most people would consider him a stretch 4, this is what you get with every starting PF in the league:
PTL Aldridge (jumpshooter)
GSW Lee
LAC Griffin
LAL Pau
PHX Morris? Fyre? (stretch, but suck)
UTH Favors
DEN Fareid/Hickson
HOU Asik? if its Montejunas he's a stretch,but he has played poorly in preseason.
DAL Dirk (kind of exceeds stretch label now, but the prototype)
SAN Splitter
MEM Randolph
MIN Love (stretch+)
OKC Ibaka (jumpshooter, not really stretch yet)
NOH Davis (Anderson comes off bench)
CHI Boozer
CLE Thompson
DET Monroe
TOR Johnson
MIL Henson probably (Ilyasova is the stretch, but likely a bench player)
IND West (jumpshooter)
PHI who knows
NYK Melo/Bargs (stretch)
NJN Garnett (jumpshooter)
BOS Humphries/Sullinger/Bass -- Bass is a jumpshooter
WSH Nene, Serpahin etc.
CHA Zeller?
ATL Milsap
ORL a mess Big Baby (jumpshooter) when healthy
MIA Bosh (jumpshooter), unless Anderson/Oden don't work when it could be Bron again.
Which is to say that unless you are counting the jumpshooting PFs, there are actually very few stretch 4s who start, and most of the ones that do are at a similar level as Patterson -- borderline guys that you hardly start trembling over and adjusting your lineup to match. But this "stretch 4" "stretch 4" thing just gets repeated in rounds again and again via the media, to the fans, back to the media. There are a lot of stretch 4s and SF converts wandering around out there, but most of them are bench players. Coaches remain oddly attached to PFs that actually play like PFs for the most part as part of their starting structures.