It is a matter of definition. The time signatures all have conventions for where the pulses are and what the feeling of repetition is. The reason it's mostly 4

It is a matter of definition. The time signatures all have conventions for where the pulses are and what the feeling of repetition is. The reason it's mostly 4/4 is that the 4/4 measures sound self-contained. And then you have an abbreviated 2/4 turnaround. So yeah, you could definitely notate it 11/4 if you want, but that would be a bit confusing to musicians used to thinking in shorter bars.