What you show here is that draws in general are more likely to occur when the stronger team is away. Fair enough, I'll accept that.
Now I'll say once again that the ratio holds even in CL quarter-finals and semi-finals (where, presumably, the differences aren't quite as massive as between Liverpool and Bournemouth or Arsenal and Huddersfield). Which tells us that getting that 0-0 draw away from home is GENERALLY a good result. Which is borne out by every single dataset. Including the fact that second legs in general rarely end in draws, as
@Brwned showed.
How do you define equal sides? Just to know so I can look at the data. Was Inter v Manchester United in 2009 between two equal sides? Were Real Madrid and Manchester United in 2000 two equal sides? Were Barcelona and Manchester United in 2008 equal sides? What qualifies as equal?
And the most obvious problem with your reasoning is this: even if the 50-50 percentage is true - which is YET TO BE SEEN - then 0-0 still has to be considered a good result for the team that plays away in the first leg. It means the home team didn't make the most of its home advantage and did not increase its own chances of going through.