Singapore is the best example of a monoculture in a diverse environment. Systematic rejection of one community and elevation of the other in government, education, military, etc. Not to mention how difficult it is to get citizenship if you're not Chinese in some form.
Also where are Singapore's innovations? Apart from building a fancy city, they have done nothing. Many Singaporeans comfortable enough and well off that I know often rush to settle down in Australia or USA or the UK, especially in tech. Why is that?
Singapore is a really good magnet for entrepreneurs from other places, but nothing much otherwise. A very artificial place with zero arts and culture - heck, they destroyed their primary language (Cantonese) in schools so as to be cozy with China for business.
In a person, inability to critically self-examine or tolerate criticism from others is a sign of a weak person not a strong person. It's the same in countries.
I'm not sure I agree that the GPs description is a good description of Singapore, but to the extent that it is, I believe Singaporean society is weaker for it.
Would you call Singapore a "weak society" with little ability to innovate? It's essentially what GP was describing.