Given what we know of the backgrounds of the people involved, I'd suggest that they've become used to the idea that other people (ie. not them, personally) can and do solve technical problems. Therefore, if the Batteriser does have any problems, they can and will get sorted.
They are, of course, completely failing to comprehend the difference between a practical or technological limitation (like not being small enough or able to handle enough current) with a fundamental one.
It reminds me a bit of the ongoing circus surrounding the use of strong encryption. Any scientist or mathematician knows that an encryption system is either strong and effective, or it can be broken by anyone with the necessary knowledge and resources. Yet, we still have politicians bleating on about how if the great minds in industry were motivated to do so, they'd be able to come up with a system that was strong and effective except when a government agency had a court order... as if mathematical operations know or care.
In this case, the politicians have the same complete mental block as we're seeing with Team Batteriser; that unshakeable faith that a deeply, fundamentally flawed idea can be made to work, even when the myriad reasons why it can never work have been spelled out to them in words of one syllable or fewer.
I wish every time I came up with something that doesn't work, as many people would repeat my work, analyse my design and explain to me so thoroughly what my mistakes were. It would make my job a whole lot easier.