Ok, I've opened PIC16F628A.INFO file, and according to it:

; The PBP default configuration for the PIC16F628A is:
;
; #CONFIG
; __config _XT_OSC & _WDT_ON & _MCLRE_ON & _LVP_OFF & _CP_OFF

So now, if I uncomment the line ; _FOSC_INTOSCCLK in that file, when I compile the program, the internal oscillator will be on by default?

This everything is very confusing, look there, read this, write this, care for this, care for that. And this is called HIGH LEVEL language? Maybe such approach was fine say 30 years ago, but now? where is progress? bulk increase in MHZ and KB ?