Meaning of the word "the cobbler's wife is the worst shod" in English

What does "the cobbler's wife is the worst shod" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

the cobbler's wife is the worst shod

US /ðə ˈkɑːb.lɚz waɪf ɪz ðə wɝːst ʃɑːd/
UK /ðə ˈkɒb.ləz waɪf ɪz ðə wɜːst ʃɒd/
"the cobbler's wife is the worst shod" picture

Idiom

used to describe a situation where someone who is an expert in a particular field neglects to apply their skills for their own benefit or for those closest to them

Example:
The IT consultant's own home computer is broken; I guess the cobbler's wife is the worst shod.
She is a famous interior designer, but her own house is a mess—the cobbler's wife is the worst shod.