Yes, I cannot see where
2:183 (Creating an ideal society requires discipline and self-restraint among the individuals.) O You who have chosen to be graced with belief! Abstinence (from food, drink and sex during the daytime) is prescribed for you as it was prescribed for those before you so that you get empowered against evil.
can be interpreted as anything else except abstinance from food and water AND everything else that goes with the understanding of Saum.
From Lughaat Ul Quran, Parwez:-
Saad, waw, miim
Saam: to stop: to abstain: to be prevented: saama unil kalaam: stopped talking: kept quiet: saama unin nikaah: abstained from nikaah (wedlock): saama unis sair: stopped walking: saamul ma-u: the water became stagnant: masamun: the place to stand.
The Qur’an has termed siyaam as a ( farz) must: 2:183 it means to abstain from morning till night from eating, drinking or having sex: 2:187 these are the days of fasting during the month of Ramadan in which the Qur’an started being revealed: a man who is a resident (not traveling), and healthy (not sick) and his physique is such that fasting does not make him suffer, then siyaam is a must for him: 2:184 a traveler after the journey and the sick after being healthy must complete the count (of the days of fasting): 2:184 but he who suffers during fasting should instead feed a needy: 2:184.
Fasting is actually a sort of military training for making the momineen capable of bearing the difficulties of jihad (struggle for establishing God’s Deen): the Qur’an has itself said: la allakum tattaqoon: 2:183 so that you become capable of looking after the laws of God: litukabbirullaha ala ma hadaakum: 2:185 so that you can super impose the laws of God as given in the Qur’an over man made laws or system: wa la allakum tashkuroon: 2:185 so that your efforts can produce full results.
Saa-imun: one who abstains from the wrong way or one who fasts: 33:35 one who controls himself: one who stays within God’s limits.
I hope that answers your question.