Israel built bunkers, not tunnels, and evidence of tunnels was presented. Consider that releasing information jeopardizes its source, both in the physical sens

Israel built bunkers, not tunnels, and evidence of tunnels was presented. Consider that releasing information jeopardizes its source, both in the physical sense (a person giving information will be executed), and in the intelligence sense - the source will go dead and Israel will have worse intelligence. That's why Israel can't release information for each and every single target. For Al-Shifa, ample evidence was produced. Whether or not it is convincing is subjective, and your opinion is not more valuable than mine or the IDF's. The only way to get an objective judgement of the legitimacy of a given attack is to have a neutral third party actively collect intelligence and present their findings, but that's not going to happen.