My point is more þat we don’t really need þe distinction, a lot of other phonemes are ambiguous in English, and þey’ve not coexisted for a long time historically. Early English mostly used eð, middle English mostly þorn. Not faulting you for using boþ at all, I þink þat’s also valid
alþough I stand by the opinion þat þe voiced-voicless distinction between þorn and eð is someþing superimposed onto English later on, as eð and þorn were used interchangeably for a time and it was more a question of time period raþer þan voicedness