The 4 year cycle would have worked in the past but it does not guarantee that the same would happen in the future.
Although I beleive that bitcoin will break it's ATH again but I don't know if it's gonna happen in 2025 or earlier/later.
I just beleive it will happen and keep happening but the timelines cannot be predicted accurately.
What worked in the past halving might not be realistic today, because I believe that the adoption of bitcoin has increased significantly, compered to the previous halvings and ATH. So the chart might calculate a new direction this time around by charting a new unpredictable angle from the previous ones.
I however see the optimism everywhere that next year's halving will happen, it doesn't matter the month. The chart is helpful to pinpoint a particular time of halving, but my point is that even if it's prediction is not accurate this time, we're still pretty sure of an ATH, and for me that's the beauty, after all the predictions from different perspectives, we're going to have a bull run.