Not total absence of evidence : indeed a lot more than you think.
First to say Christians are Not obliged to believe in so called miraculous phenomena, indeed that is not the basis of faith. But as a scientist and having studied many phenomena , I say the evidence is much and compelling.
Since it features elsewhere in threads I have written of late, I will list a few of those.
1/ Fatima - the prophecy not the apparition.
Months before an apparition said come on Oct 13 - 1917
and "God will perform a miracle that all will see and believe!"
On that day, in that place, 100000 witnesses many sceptics, including professional witnesses and authorities who wanted to wipe out religion and debunk it , and a secular press , ended up confirming it. Both prophecy and fulfilment.
The sun danced, emitted bands of colour and was seen to fall. Torrential rain earlier caused mud which dried instantly. It wasn't mass hysteria, it was witnessed from miles ( furthest was 20) and by those distant who had not heard of the prophecy. Including by many skeptics.
Sceptics focus on rationalising the phenomenon. They miss the point. It was extraordinary, not seen before or since, in Portugal, and happened exactly when and where it was prophesied. No explanation is possible.
2/ Same lady prophesied in 1917 that " God is offended, and unless man changed his ways , " know that an unknown light will herald a worse war". On Jan 25 1939 curtains of red light were witnesses across much of the northern hemisphere , reported in all national newspapers. Reported as an aurora, which are normally green and limited, this was red , across many countries as far as Africa and far more similar to noted nuclear weapon aurora.
This was within days of Hitler threatening Poland and Stalin deciding to join the war.
Same lady predicted that Russia ( which had yet to become a functioning state, let alone the threat it became) - would spread its errrors over the world. How could the children who witnessed the lady make that up?
But there are masses of others..
I referenced in Portugal
3 - the controlled trial certified inedia of Alexandria da costa
4 - the extraordinary behaviour of doves at bombarral
5 - the scientifically analysed statue of Akita weeping, and the worrying messages associated. Same lady now predicts a worse war still.
6 - the forensic analysis of Eucharistic miracles at tixtla, sokolka, legnica, lanciano and buenos airies. Life and flesh where there was none.
7 - the forensic analysis of the statue of Cochabamba,
8 - the prophesied and analysed and filmed stigmata of Katya rivas. The almost instant healing of wounds as much a medical mystery, as the stigmata,
9 - the writings of stigmatic Therese Neumann gramattically flawless in ancient languages apeasant can never have known. Indeed Katya Rivas writings, the witness speed and continuity no author can match,
10 - the medical mystery that is incorruption of such as bernadette.
11 - indeed the forensic investigation of shroud and sudarium, and the impossible to explain image on it,
Forget the junk RC testing, long disproved.
12 - the impossible to duplicate real image apparition at zeitoun, even now science cannot duplicate it, and never will with conventional science. Witnessed by millions, of all faith and none, all walks of life, over years.
13 the vision of a mediaeval bedridden nun in Belgium, that led to locating a site in turkey, the house of Mary " panaghia capouli" , describing it as it was 2000 years before,on,y because of the vision was it found, abs only by digging was the foundation revealed in exact correspondence with the vision.
How was consciousness achieved of 2000 years before?
In many cases, These are serious forensic labs reporting, whose voices in criminal trials are accepted as fact.
No Christian is obliged to believe the above.
As a scientist used to analysing data, I find them hard to discount and impossible to explain. Now or future.
Need I go on?