…のも無理 (は) ない => It's natural for... N3
Evaluate
のも無理もない => (to be) natural,(to be) understandable N3
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~助詞+数量      => Corresponds to the verb...of quantity N5
Quantity
に関わらず/に関わりなく => in spite of; regardless of ~ N2
に関して => about; regarding; related to ~ N3
[関「かん」]して => About A, With relation to A N3
Considering, Concerning
に関わって => to relate to; to have to do with; relating to ~ N2