Like many things in Singapore - once you go in the wrong direction for too long you find it impossible to U-turn, be it housing, public transport or healthcare.
The hard truths become hardened. When school banding is eliminated, parents complain. When T-scores are eliminated parents complained. I can see Heng Swee Keat's efforts but the system has hardened over time. It is impossible to make the Finnish system work in Singapore.
One thing about the link posted - it says Finnish students scored "one of the highest" in Maths and Science when tested internationally. You know who scores the highest? Singapore. We put in tons of stress and mountains of effort to get a marginal edge over them. At the end, the Finnish educate 66% of each cohort to university level and Singapore less than 30%.