The hypothesis has been given that "Quality of bowling in PSL is superior to that of in the IPL" but what are the parameters upon which one has proven this hypothesis? Nobody knows, except some nationalism mixed with low scores in the PSL.
To me that is ridiculously absurd. I don't think there is any evidence to suggest the quality of bowling is superior in PSL. The one way you can judge whose bowling is superior is if both the bowling attacks are exposed to the same elements. On one hand you have guys like Umaid Asif, Sameen Gul, Irfan Jr, Haris Rauf, Mohammad Nawaz, Akif Javed bowling to the likes of Ramdin, Walton, Sohail Akhtar, Azam Khan, Saad Nasim whereas on the other side you have guys like Deepak Chahar, Saini, Mavi, Bishnoi bowling to the likes of De Villiers, Kohli, KL Rahul, Samson, Kishan, Rana. How is that even a fair comparison? Based on what has it been decreed that PSL bowling is greater?
The Pakistani bowlers get away with murder simply by bowling to an incredibly poor batting lineup who are mostly mid-wicket hacks and can't improvise at all. You bowl a wide off-stump line and 9 times out of 10 the PSL batsmen are slogging across the line towards mid-wicket. These same bowlers then got a royal pasting once the PSL shifted to Pakistan on true batting pitches by even these mediocre batsmen. I can only imagine what the likes of Kohli, De Villiers, Buttler, Warner would do to them on grounds like Chennai, Bangalore. It would be a massacre.
People say you just have to see how De Villiers and Gayle flopped in PSL but look like kings in IPL as if that is the evidence of PSL bowling being superior. (De Villiers by the way hasn't been a flop). The problem with that line of argument is that it goes both ways. Wahab Riaz gets murdered in T20 internationals against top teams but is highly economical in the PSL. Luke Ronchi will never play for NZ again yet annihilates PSL bowling time after time. I can provide many example but let's just put this argument aside as it's not a convincing one.
If this was 2007-2010 and there was a PSL at that time and people said that the PSL bowling is superior to IPL bowling, then there would've been some merit in that argument. During those years Pakistan were the best T20 team in the world and actually had world class bowlers. Umar Gul was at the height of his powers, Ajmal was exceptional, Afridi, Hafeez, Shoaib Akhtar, Sohail Tanvir, Mohammad Asif, Mohammad Amir. That was a genuinely good time for Pakistan bowling. However to suggest that PSL bowling at this moment in IPL is superior is quite absurd.
Living in denial can never benefit anyone. Pakistan had always led India in bowling but since 2010, that advantage has also vanished. There's no use not accepting that fact and trying to prove that Shadab and Imad are still better bowlers than Kuldeep and Chahal. Or that Bumrah, Shami and Ishant are not better than Shaheen, Naseem and Abbas.
But as I mentioned in my other post on another thread, there is no use comparing PSL and IPL. Both are in separate leagues altogether. There is a complete mismatch in quality. But that doesn't mean PSL deserves to go into the trash can. PSL is doing the best it can with whatever resources it has. So let it be. No need to try to force it to be better than the IPL in any dimension.
