Hong Lim Park was chosen as the location for Speakers' Corner as, among other reasons, it was a historical venue for political speeches and rallies

https://en.wikipedia.org/wiki/Speakers'_Corner,_Singapore

Speakers’ Corner is set up for Singaporeans to exercise their freedom of speech without any restriction whatsoever, beyond the obligation to apply for permission and then comply with 13 pages of terms and conditions

Speak out and be damned

The government of Singapore says it welcomes criticism, but its critics still suffer

ECONOMIST.COM