And flash-bang grenades are not without health risks. They can cause permanent hearing damage, and earlier this month a teenager lost their hand to a stun granade in protests near Paris (conflicting accounts, either an unlucky direct hit or he picked it up to throw it back). I really don't see how a flash-bang grenade is justified against a person sitting in front of a computer, doing non-violent crimes. Non-violent options exist, as was successfully demonstrated in the cases you mention
Giving the police better non-lethal weapons is always easy to justify by citing all the cases where they can replace more lethal weapons or directly lead to better outcomes. But given a couple years time they always end up being used for more and more mundane situations where the harm clearly outweighs any gain. Same story with pepper spray, tear gas grenades, tasers, even anti-riot water cannons.
Giving the police better non-lethal weapons is always easy to justify by citing all the cases where they can replace more lethal weapons or directly lead to better outcomes. But given a couple years time they always end up being used for more and more mundane situations where the harm clearly outweighs any gain. Same story with pepper spray, tear gas grenades, tasers, even anti-riot water cannons.