How do assumptions relate to the process of critical thinking?

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PLEASE HELP ME EVALUATE THIS ARGUMENT
Recently, people have been arguing that marijuana should be legalized because it is really no different than alcohol. as convincing as this argument seems, it is too flawed to be taken seriously. Thoughthere are similarities between the two substances, apart from its medicinal use, marijuana is consumed by individuals for only one reason in this country: intoxication. On the other hand, alcohol is used for a variety of purposes that have nothing to do with getting intoxicated. Alcohol is used in celebrations such as marriages and anniversaries, in religious rituals, and as a gourmet element.

To evaluate this argument, we need to examine the assumptions made and evaluate their validity.

1. Assumption: Marijuana is only consumed for intoxication purposes in this country.
To evaluate this assumption, we can gather evidence on the various uses of marijuana beyond intoxication. For example, there is evidence of medical uses of marijuana to treat certain conditions or alleviate symptoms. Additionally, in some states where marijuana is legalized, it is also used for recreational purposes without the intention of intoxication. By considering the evidence, we can determine if this assumption is valid or if it oversimplifies the uses of marijuana.

2. Assumption: Alcohol is used for a variety of purposes unrelated to intoxication.
To evaluate this assumption, we can examine the different cultural, social, and religious practices where alcohol is used. We can gather evidence on the role of alcohol in celebrations, rituals, and culinary applications. By considering the evidence, we can determine if this assumption accurately represents the diverse uses of alcohol.

By evaluating these assumptions, we can assess the validity of the argument that marijuana should not be legalized because it is consumed solely for intoxication purposes. Critical thinking involves questioning assumptions, examining evidence, and assessing the logical coherence of arguments to arrive at well-reasoned conclusions.