Because with the exception of Trump and Pete Hegseth, the other sources mentioned in that White House release only point to the sites being very significantly damaged (particularly Fordow), rather than Iran losing the ability to develop nuclear weapons in the future. For example:
Israel Atomic Energy Commission: "We assess that the American strikes on Iran’s nuclear facilities, combined with Israeli strikes on other elements of Iran’s military nuclear program, has set back Iran’s ability to develop nuclear weapons by many years.
IDF Chief of Staff Lt. Gen. Eyal Zamir: “I can say here that the assessment is that we significantly damaged the nuclear program, and I can also say that we set it back by years, I repeat, years.”
Iran Foreign Ministry spokesman Esmail Baghaei: “Our nuclear installations have been badly damaged, that’s for sure.”
Vice President JD Vance: “I can say to the American people with great confidence that they are much further away from a nuclear program today than they were 24 hours ago. That was the objective of the mission, to destroy that Fordow nuclear site, and of course, do some damage to the other sites as well, but we feel very confident that the Fordow nuclear site was substantially set back, and that was our goal.”
Chairman of the Joint Chiefs of Staff Dan “Razin” Caine: “Initial battle damage assessments indicate that all three sites sustained extremely severe damage and destruction.
Secretary of State Marco Rubio: “The Iranian program — the nuclear program — today looks nothing like it did just a week ago … That story is a false story and it’s one that really shouldn’t be re-reported because it doesn’t accurately reflect what’s happening.”
Secretary Rubio: “Everything underneath that mountain is in bad shape … There’s no way Iran comes to the table if somehow nothing had happened. This was complete and total obliteration. They are in bad shape. They are way behind today compared to where they were just seven days ago because of what President Trump did.”
Special Envoy Steve Witkoff: “We put 12 bunker buster bombs on Fordow. There’s no doubt that it breached the canopy, there’s no doubt that it was well within reach of the depth that these bunker buster bombs go to, and there’s no doubt that it was obliterated — so the reporting out there that in some way suggests that we did not achieve the objective is just completely preposterous.”
Director of National Intelligence Tulsi Gabbard: “The operation was a resounding success. Our missiles were delivered precisely and accurately, obliterating key Iranian capabilities needed to quickly assemble a nuclear weapon.”
International Atomic Energy Agency Director General Rafael Mariano Grossi: “Given the explosive payload utilized, and the extreme vibration-sensitive nature of centrifuges, very significant damage is expected to have occurred.
Institute for Science and International Security President David Albright: “Overall, Israel’s and U.S. attacks have effectively destroyed Iran’s centrifuge enrichment program. It will be a long time before Iran comes anywhere near the capability it had before the attack.”
Foundation for Defense of Democracies’ Nonproliferation and Biodefense Program Deputy Director Andrea Stricker: “I think that because of the massive damage and the shock wave that would have been sent by 12 Massive Ordnance Penetrators at the Fordow site, that it likely would render its centrifuges damaged or inoperable.”
American Enterprise Institute Middle East Portfolio Manager Brian Carter: “There is no question that the bombing campaign ‘badly, badly damaged’ the three sites.”
Institute for Science and International Security Senior Research Fellow Spencer Faragasso: “Overall, it may possibly take years for Iran to reconstitute the capabilities it lost at these facilities.”
https://www.whitehouse.gov/releases/2025/06/irans-nuclear-facilities-have-been-obliterated-and-suggestions-otherwise-are-fake-news/