Putin's power is built on being a strong, tough Alpha-male; and being portrayed as a weak and fragile old man undermines this badly which is good.
Yes, this.
It's not 'someone'. It's a repulsive genocidal dictator who has taken great care to try and portray himself as physically strong and virile. It's part of his image and mystique. He would not be where he is today had he not been able to successfully portray himself as a strongman. Being a strongman doesn't leave any room for shitting yourself incidents. Which yes, does say a lot of bad things about human attitudes to physical weakness, illness, disability etc, but that is the context in which Putin operates.
None of which is to say there's any truth to this, of course, but that's why morally it would be completely fine to report on such an incident.