Yes, I think that's perfectly plausible.
To pull off this nature-themed, salt-flavoured, very successful Bonnie and Clyde phenomenon couldn't have worked without TW's charm and charisma.
SW, while the mover and shaker in terms of actively perpetrating the thefts, and writing the books, and fronting the publicity, is just not obviously likeable or open enough to create the necessary links with others.
She keeps being described as 'quiet', 'shy', 'guarded', and 'private', but everyone has a good word for 'rockstar' TW -- good-looking, charming, talkative, a natural people person.
And that's even before you add in the pathos of this life-enhancing dandy facing a cruel death...
TW was the one who got them involved with the Hemmingses in the first place, charmed everyone, and got SW the job that allowed her free access to a slightly chaotic small business that she scammed for seven years.
It appears to have been worries about TW's health and happiness that prevented his parents from going to the police when they discovered the theft from them.
'Anna' let them have the Polruan flat because of TW's charming loquacity.
BC clearly started off as a fan of SW's writing, but seems to have become closer to TW, the dying dandy. And it was his fears about TW's health, and his guilt that perhaps his expectations were too high for what he could manage on the cider farm, that led him to bend over backwards for them, and override all his own suspicions for so long.
Ruth Salperton thought SW was 'shy' and 'nervous' when she first called to Haye Farm, and while she herself had been concerned about potentially bringing Covid to the house of someone vulnerable, she says in the podcast that, to her surprise, TW was completely unconcerned about social distancing, and that it was 'like meeting a rockstar', referencing his unusual height, his good looks, his 'presence', his piercing eyes, and him being 'warm and friendly and talkative'.