Apart from certain genitive, prepositional, general and set uses, is there much want of the difference with the direct relative?

I read this last night:

Deir siad gur ghoid na síogaí í

-an ghirseach a ghoid na síogaı!

-an ghirseach ar ghoid na síogaí

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__̴ı̴̴̡̡̡ ̡͌l̡̡̡ ̡͌l̡*̡̡ ̴̡ı̴̴̡ ̡̡͡|̲̲̲͡͡͡ ̲▫̲͡ ̲̲̲͡͡π̲̲͡͡ ̲̲͡▫̲̲͡͡ ̲|̡̡̡ ̡ ̴̡ı̴̡̡ ̡͌l̡̡̡̡.___

The resumptive pronoun is missing in indirect relative clause:

an ghirseach ar ghoid na síogaí í

The want is the ambivalence of the direct relative: Ní féidir a rá gan comhthéacs cé acu a ghoid: na síogaí nó an ghirseach.

Bhail, cuideann a' comhthéacs leis a' chiall a thuigbheáil : ní dóigh liom go dtiocfadh le giorsach nó le duine ar bith síógaí a ghoid

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Is fearr Gaeilg na Gaeltaċta ná Gaeilg ar biṫ eile
Agus is í Gaeilg Ġaoṫ Doḃair is binne

Ní fhaca mé riamh na síogaí. B’éigean dó gur goideadh iad