Swords such as Tizona and Colada have 'power' as political 'status' symbols. Later leaders may use such an 'icon' to 'rally' its people to a cause.
Holy relics (in Europe) were often faked, but the masses, unaware would travel 'hundreds of miles' on pilgrimages to view them. This gave the owners power, prestige and often , an income
Hitler, himself, ordered the search for the 'spear of destiny', the spear alleged to have pierced Christ's side during the crucifixion. He realised, the political power and status he would gain by it's possession . In fact 'the' spear was recently denounced as a medieval fake ....
During the Crusades there is a story where they were heavily outnumbered and their morale low. A monk allegedly had a vision that the "holy lance" would aid them.
" .....Meanwhile in Antioch, on June 10 an otherwise poor and insignificant monk by the name of Peter Bartholomew came forward claiming to have had visions of St. Andrew, who told him that the Holy Lance was inside the city. The starving crusaders were prone to visions and hallucinations, and another monk named Stephen of Valence reported visions of Christ and the Virgin Mary. On June 14 a meteor was seen landing in the enemy camp, interpreted as a good omen. Although Adhemar was suspicious, as he had seen a relic of the Holy Lance in Constantinople, Raymond believed Peter. Raymond, Raymond of Aguilers, William, Bishop of Orange, and others began to dig in the cathedral of St. Peter on June 15, and when they came up empty, Peter went into the pit, reached down, and produced a spear point. Raymond took this as a divine sign that they would survive and thus prepared for a final fight rather than surrender. Peter then reported another vision, in which St. Andrew instructed the crusader army to fast for five days (although they were already starving), after which they would be victorious.
Bohemund was sceptical of the Holy Lance as well, but there is no question that its discovery increased the morale of the crusaders. It is also possible that Peter was reporting what Bohemund wanted, rather than what St. Andrew wanted, as Bohemund knew, from spies in Kerbogha's camp, that the various factions frequently argued with each other, and they would probably not work together as a cohesive unit in battle......"
It would seem likely, that these two swords have been replaced with impostors ..which would have been staunchly 'defended' as being the originals ...by those whom had possession of them ...to achieve their political agenda.. much like the 'holy relics'......
In my opinion, the web of lies and deceit created would make research incredibly difficult as later generations continued to believe their truth.