This is not true at all.

This:

    #include<stdio.h>
    main()
    {
      int sum; int x; sum=0;
      for(x=1;x<=50;++x) 
      {
         sum = sum + x; 
      }
        printf(" 1+2+...+50=%d\n",sum);
      }

Is more cognitive load and error prone than this:

    (println (reduce + (range 1 50)))

This is mostly what experienced FP advocates tell you. Btw. you can transpile the latter to the former.