Pete: whomever he may be thinking of, we can only work on what is written. I am not struggling as you say, I believe it's very clear. Jesus and Michael are not the same, but thanks for that info.
Jesus, (a name likely drawn from that same Zechariah section aka branch) is a separate figure in some contexts. Much like the Logos was separate from Wisdom in some late Jewish works but used pretty interchangeably in others. Similarly in Daniel (in its final redaction) an editor equates the Son of Man with Michael. These names were plastic/somewhat loose in usage. Philo sees the Logos as basically the sum of other emanations. The earliest Christians apparently felt similar. Jesus is called Son of Man, Son of God, Wisdom and Logos as well as other terms associated with the second power concept. 'Michael' in Revelation (which was likely a collection of Jewish works before being redacted into a Christian one) is depicted again as the warrior great prince/angel/Son of Man. It seems likely that the Christian responsible for the redaction of this Jewish symbolism assumed readers would understand the 'Michael' figure as another facet/face of the 'Lamb', the Lion, the 'Christ' 'Son of Man' and 'mighty Angel' in a second power warrior role. Yes, that might be surprising but I'm of the mind that the various 'strong angels' in Revelation are likewise symbols of this same concept. Note that the 'strong angel' is described in the typical theophanic manner as Yahweh (Eze 1:26-28) and Jesus (Matt 17:2) are.
Then I saw another mighty angel coming down from heaven. He was robed in a cloud, with a rainbow above his head; his face was like the sun, and his legs were like fiery pillars. 2 He was holding a little scroll, which lay open in his hand. He planted his right foot on the sea and his left foot on the land, 3 and he gave a loud shout like the roar of a lion. When he shouted, the voices of the seven thunders spoke.