Is the knowledge of cloud platforms (gcp, azure or aws) mandatory for a data scientist role or python/sql/tensorflow/pytorch is enough?

I have plans of switching my career to data science, and I have plans to learn python/sql/tensorflow/pytorch. A lot of people always tell me I have no chance of entering data science unless I know some cloud, but I think python/sql/tensorflow/pytorch are more important than aws or gcp. Those cloud platforms can be taught on the job? So what's your impression? Is cloud necessary to enter data science?

aws azure cloud data datascience data scientist gcp knowledge platforms python pytorch role sql tensorflow