University rankings are not entirely pointless exercises for students in Singapore, as they can provide some useful information on the reputation, quality, and international standing of universities. However, there are some limitations and drawbacks to relying too heavily on university rankings when making decisions about higher education.

Firstly, university rankings often focus on research output and academic reputation, which may not reflect the strengths and interests of individual students. Rankings do not account for differences in teaching quality, the availability of specific courses or programs, or the fit between a student's career goals and the university's strengths.

Secondly, university rankings are often based on subjective and limited criteria, such as survey results or the number of research papers published, which may not reflect the full range of factors that contribute to a university's quality and reputation.

Thirdly, rankings can be highly volatile and subject to manipulation. Rankings can change significantly from year to year, often due to changes in methodology or changes in the data used. Some universities may also engage in tactics to manipulate their rankings, such as selectively reporting data or engaging in strategic research partnerships.

Finally, the focus on rankings can create an unhealthy obsession with prestige and status, rather than a focus on individual learning and growth. Students may feel pressured to attend highly ranked universities, even if it is not the best fit for their interests and goals.

In summary, while university rankings can be a useful tool in decision-making, they should be considered in conjunction with other factors, such as the individual student's interests and goals, the quality of teaching, and the availability of specific programs and courses. Students should not rely solely on rankings when making decisions about their higher education.