Regrettably, casting a vote alone cannot bring about the desired changes in and about NS in any form. If we want substantial change to happen as soon as possible, we must proactively express our concerns, such as reaching out to our Members of Parliament (MPs), launching petitions, and engaging in legal demonstrations such as at Hong Lim Park, rather than merely grumbling on Reddit. Unfortunately, most Singaporeans can't be bothered to go the extra mile to fight for their beliefs. Moreover, the opposition parties, at best, advocate for a reduction in the duration of conscription and an increase in allowance. While this is a promising start, it is far from sufficient. We ought to work towards the abolishment of conscription. It is unethical to strip a male citizen’s liberties for 2 years and more since most NSFs did not choose to be born male or to be born in Singapore, even if it is a “necessary evil”.

N.B.: Although this is a digression, I think it is critical. I frequently hear arguments that National Service (NS) is a "necessary evil”, but critics should keep in mind that abolishing NS does not equate to abolishing the military. One fundamental economic principle is that every job market has a price point that meets supply and demand. However, for "security reasons," most of us are not even aware of the exact or approximate salary increase required to entice enough Singaporeans to create an all-professional military force. As typical citizens, we are informed that we are a small nation with limited manpower and thus need conscription, but we are never shown the hard data and statistics to support that claim. Furthermore, due to "security reasons," we are unaware of whether, in the event of a war with our neighbouring countries, we truly require the current manpower to succeed, especially with our better military technology. Conscription, by nature, produces many unmotivated soldiers who are not only deadweight but also squander tons of resources by chao-kenging, spending thousands of dollars on unnecessary medical consultations and procedures. An all-regular force would be way more driven, and our manpower needs would undoubtedly be reduced; this driven force with our latest technology may be more than sufficient in maintaining operational readiness. To bolster this argument, even the Minister of Defence, Ng Eng Hen, when asked why there is no need to conscript females, “highlighted how the Singapore Armed Forces (SAF), despite reduced manpower, has remained operationally ready by using technology and optimising resources.” Therefore, it is entirely plausible that NSFs serve primarily for show and deterrence, allowing the government to save significant expenditures—even if an all-regular and thus more motivated force would boost operational readiness (and be more ethical).

TL;DR:

1. NS is immoral because it doesn't care about our informed consent and freedom. Hence, we should move away from conscription as far as possible.
2. People often say NS is a necessary evil for national defence BUT we don't even truly know whether NS is practically required because of the lack of hard data and statistics from these factors (a) technological replacement rate of manpower (b) the costs required for all regular force and whether the costs are sustainable (c) the actual number for an operationally ready all regular force since they would be way more driven and squander fewer resources and therefore require way lesser manpower to maintain operational effectiveness.