With all due respect, saying that GT5 is the best racing game is an opinion. On the other hand, many people collectively agree that GT5 doesn't live up to the standards set by the previous iterations.
Even for a simulator, if it's no fun, then why bother with it at all? GT5 is not the most realistic driving game out there. Something like rFactor or iRacing is more realistic. Nor is GT5 the most exciting racing game. So what's the point of this half-assed game?
I appreciate the 'with all due respect' part. rFactor and iRacing are primitive (yes, imo) compared to GT5, graphics, physics, car selection, value for money, all of which pale in comparison to GT5, GT5s only problem - it's on a console not a PC.
If it were on a PC no one would even question that it's the best, but the elite PC racing sim gamers look down their nose at GT5, and claim its arcade, because its made by a Japanese company called PD, but when you look at what the PC sims, you have to start to ask why?
rFactor has no shadows, no weather effects, and have you seen the 'official' car list? '39' street cars, '18' stock cars, all up it has a massive total of a poorly rendered 368 cars, 125 of which are open wheelers, another 100 odd are touring, and I wouldn't call any of them even a standard in GT5. I know it's only $40, and who knows rFactor 2 might be better, but this is not up to par with GT5 in many many ways. Yes I've played it, it left much to be desired.
iRacing... $90 every year for a kick off, and this with what I would call an inferior game. That $90 subscription doesn't even cover paying for even the entire list of their abizmal car list, the most interesting car there is probably the Volkswagen Jetta, or it may as well be. 'No' I haven't tried it, why would I try it when committing to it would cost me $90 a year? That's beyond idiotic, its pure lunacy, especially for the lack of substance it has.
I like PC gaming and mods, but there has to be something to work with, and even with the (possible) mods, these games don't impressive as much as they should be given the media they use. GT5 has no rivals on the PC.
EDIT: And you call GT5 a half-assed game? Please.