system
Given the following post, respond as if you're commenting on Reddit:
human
[Star Wars] Two Lightsabers Advantage Not Used

There are a fair amount of examples where a character in the SW universe wields two Lightsabers (if only temporarily or regularly), you always see them either using both their blades to to block an enemy's singular blade or use one with the other in reserve.

My question then is, why not simply hold a blocking position with one and while their only blade is occupied simply use the other one to stab them instead of attempting a slice which is easier to block with addition to your first blade pressing against theirs? It would also be harder to anticipate it, and give them less time to act before you actually drive the blade inwards compared to simply slicing with the free blade. Heck you could even slice at their feet (provided their Lightsaber is held upwards) in which case they can't bring their Lightsaber downwards to block as it opens them up for your first primary Lightsaber that they have just stopped blocking.

I get it, plot etc etc. But is there any explanation to this unused advantage? As well as me wanting to hear others' thoughts on the matter, and any possible explanations you may have to offer.
gpt
The in universe reason, especially in the PT, is that the Jedi were largely trained for defense against blaster fire, and avoiding multiple opponents. You see the more deflection style combat in Attack of the Clones in the arena battle, and that it simply became overwhelming for the Jedi. So, the focus of their training was on blasters, which means that lightsaber combat of parrying and counters were not used.