There is not much rhyme or reason in the size of a genome. The human with 3.1 billion base pairs is seven and a half times more than the puffer fish, Fugu rubripes (of crazy Japanese dining fame) which has 400 million base pairs.
As you mention Cofty, the interesting bit is that much of the of human DNA code is duplicated and we seem happy to drag around so much redundant coding without effect or biological stress. It bears the evidence of evolved biology and not the work of an idealized perfect creator. Scientists hoped to find uses for the duplications but the greater interest these days is in epigenetic factors i.e the circumstances or environment of gene transmission.
The puffer fish expresses most of all its genes which, having a backbone, makes it a useful organism to use in researching evolutionary change. A bit like the genetecists old favourite, the fruit fly Drosofila, which has just four large chromosomes.
How about the loblolly pine, Pinus taeda which has seven times the size of the human genome with 21 billion bases? The smallest known genome belongs to is a symbiont bacterium living inside a bug which has just a paltry160 thousand base pairs.
It looks like chance at work here in the arbitrariness of genome size and the randomness of duplication, but by getting to know a bit about DNA one can only marvel at Mother Nature’s refined methods.
Fisherman might I suggest you are confusing your assertions with the philosophical notion of Karl Popper who pointed out that the only useful information was that which could be falsified. Facts are good because they can be falsified! But you must show the evidence...
Science proceeds by disproving things as well as predicting and testing by experiment. You could falsify evolution and biological data, they are real things; hence we are dealing with factual evidence however if you falsify data as a scientist you will be dismissed and disgraced.
On the other hand you cannot falsify God's love anymore than you can prove or disprove God since there is no data on him... and therefore he/she/ it is a factual irrelevancy.