You mean the Gelatin? Not only him, Rabbi Abadi, Rabbi Ovadia Yosef and Rabbi Bar-Hayim does soo as well. Basically all the Sefardim and amoung the Askenaism their are as well who also agree to this. Its in the Rambam as well. From our point of view its not a Kula to rely on it, but the Halacha the only question is those who do not rely on it on what sources are you relying on? ( I can send you the Teshuva on this) but the question isn't why he is doing this Kula (or if it is a Kula), but why you are doing a Humra (or even more soo) doing something at least we don't see problematic at all.
Is that all? What about the meat is their any real complaints about the meat in particular? At least according to R' Abadi they say its because they don't like him personally and not to listen to rumors made by the industry but to see and go by real evidence and such. Soo as someone who worked (or works) in that industry from your perspective is their anything substantial to the claims or its just politics?
Most in the Ashkenazi community do not accept gelatin as being okay & hold that those that do do so al pi kula ask the OU,OK.NK,Star-K,Chaf,K,KAJ,CHK,etc.
As far as the meat I know those that say it is chumra & others that say it is politics,I do remember that until the late 70's the OU gave hechsherim on non-glatt meat & soon afterwards stopped & started with a glatt only policy.
As I said I worked as a mashgiach for over 20 years & I know things that most wouldn't. & things are always changing.
I remember a time when butchers & rstaurants had no hecsher at atll other than on the products & people just relied on them if they were religious & that is no longer the case today.
But I can tell you much of it is politics for instance for years nobody used Maneshchwiz all of sudden it gets an OU & it is okay.the previous hecsher were 2 local NY rabbanim who everybody held by but wouldn't use their wine for some odd reason.
Same with Hebrew National it was good under Rabbi Yehuda Atulsky,ZT"L & later under Rabbi Tibor Stern,ZT"L & still good under Rabbi Ralbag but people don't use it.
You can not say it is not kosher some may be chumros or kulos & other could be politics.