I would recommend that YES, you should still file an ITR even if you're technically exempted from filing it (for example, you earned less than 250K gross for the year).

Why is that? From experience, it's much easier to just show an ITR versus having to explain the exemption rules of the BIR. For example, if you are getting a VISA, it's easier to just submit your ITR to the officer rather than having to explain why you're exempted -- most of the time, especially for an officer that would rather stick to the "letter of the law," that's an easy automatic disqualification. Same case if you're getting a bank loan -- the capacity to provide all the documents is considered in your credit assessment. If you can easily provide all the required documents, then the risk assessment board in the bank would not have to follow an exemption process for you.