IELTS writing task

Some people believe that there should be fixed punishmentS for each type of crime. Others, however, argue that the circumstances of an individual crime, and the motivation for committing it, should always be taken into account when deciding on the punishment.
Discuss both these views and give your own opinion.
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Nowadays, it is generally believed that each type of crime should be tackled with fixed punishments to discourage illegal actions. Nevertheless, others think that all the peculiar circumstances and the motivations of an individual crime should be discussed before deciding on the appropriate punishment.
This essay will discuss both of these two opinions about crime measures. (We don't use this phrase but it is hard to find an exact equivalent: "approaches to crime" works but in that case you could eliminate "opinions about" too. Best would be "crime and punishment")

On the one hand, some people sustain maintain that for every kind of crime a particular punishment should be imposed on the criminal. In other words depending on the gravity of the penalties there (should be fixed) more or less strict punishments should be fixed. (No need for the "there are" formulation) For example, fines or short periods of prison could be enough to avoid deter small crimes and the maximum rate or the worst punishment should be given for murders or aggressors.
In this way it is possible to guarantee a good level of justice for the victims of the illegal actions.

However, many people disagree with this principle and argue want the ("Argue" does not take a direct object this way. You could use "advocate" but I think want is better.) the opportunity to decide for the most appropriate measures on every crime, because the same illegal action could be committed under widely different circumstances. In this way justice would be done without over punishing the guilty individual too much. (You could use "overpunish" as a verb, but it's rare and nonstandard, I think.)
For example, this procedure should be followed to ensure that people did not commit crime under unusual physical and psychological states with no real awareness of what they did.

In my opinion, I would agree with the second extent opinion/position because I believe that justice should be done in the right way, in order to not be too severe when the crime does not need strict measures.
We must not forget that criminal individuals are still human beings people and should be treated as such.
Well done! Watch out for sentences that are too long or run-on sentences that are really two sentences.