Anyone else read William Parry's book on the Valsalva Hypothesis? Trying to make sense of "Focus your intention on relaxed breathing" vs "say the vowel with feelings"

Anyone else read William Parry's book on the Valsalva Hypothesis? Trying to make sense of "Focus your intention on relaxed breathing" vs "say the vowel with feelings" This is on page 207 of the 3rd edition of [his book](https://www.amazon.sg/Understanding-Controlling-Stuttering-Comprehensive-Hypothesis/dp/1929773242), in case anyone else has it. He talks about a "relaxed river of air" being the driving force for our speech, and that instead of focusing on saying the words, and risk winding up in the blocks, one should focus on their intention on the exhalation which tides our speech. But I'm trying to wrap my head around how this ties in something else he says about "saying the vowel with feeling". He talks about disregarding the non-vowel sounds as mere decorations, and to focus on vowels instead. It's not quite clicking for me yet how these go hand in hand.