Is a person afflicted with social phobia considered to have severed ties of kinship if they refrain from visiting their grandmother and some relatives due to their illness, despite their good intentions?

"Upholding kinship ties involves showing kindness to relatives according to the circumstances of both the one who connects and the one being connected with. This kindness can be through money, service, visiting, or greeting. Visiting is not obligatory unless its omission is considered a severing of ties by custom. A person suffering from social phobia is excused from visiting if it causes them harm or unusual hardship."