I could argue it either way. But I think it's reasonable to suggest that there will always be people who are scammers (or so oblivious that it amounts to the same thing). We've only heard of Adam Neumann because investors gave him billions. SoftBank in particular gave $10+ billion [1], and I understand that's really just Masayoshi Son making those decisions. So I think it's reasonable to give him a lot of the blame for empowering somebody whose business plan appears to have been surprisingly close to that of the Underpants Gnomes [2].
[1] https://www.bloomberg.com/news/articles/2019-09-06/wework-ip...
[2] https://knowyourmeme.com/memes/profit