Let's get a baseline for comparison. For example, how many climate tech startups, or tech startups in general, are "likely junk"? That would give us some helpful context.
If this 78% figure is consistent with the figures of tech startups in general, that would suggest a connection.
And that's only one reason why I'd like a baseline; there are many more. Throwing out a single percentage without comparisons for context is just plain bad statistics. It is not meant to inform, merely to persuade.