Imagine if, runs tied, England had 13 fours and 2 sixes across regular match + super over. And we had 10 fours and 4 sixes. Both teams have same runs, and same total runs from boundaries (64).
England still win on number of boundaries (15 vs 14), even though we have more sixes.
The boundary rule is presumably there to encourage more aggressive/swashbuckling play, but isn't even coherent in how it does that! It assumes boundaries are "better" than 1s and 2s, but not necessarily that 6s are better than 4s given the above. So it's completely ridiculous.
especially when in todays cricket a lot of the ones and twos are saved right on the boundary