I disagree with the diagnose, the issue as I see it is that there is indeed more risk averse behaviour in European Investment Banking and VC's.
Also there is not enough competition in banking in Europe it's effectively the same banking group's since the 1800's which again impacts risk behaviour. They can all get very attractive returns with near zero risk in real estate investment.
Anyone in the VC scene in Europe will demand a huge amount of due diligence and large fraction's of the company for moderately small amounts of investment, because they probably struggled a lot more to round that funding.
You either have central European banks ear marking specific loans for R&D/Seeding only or you need to make real estate less attractive to park money into.