Could Oracle create an OOTB generate_series() function? https://www.citusdata.com/blog/2018/03/14/fun-with-sql-generate-sql/
Example: https://stackoverflow.com/questions/72059481/generate-rows-from-string-of-numbers. I can't easily solve that problem -- without making things complicated with CROSS JOINS or CONNECT BY. Having an OOTB generate_series() function would make things simpler.