I have poked the xenon many times. My usual field test of a ship is to go and waste xenon core. Nothing but nothing makes it past my blockades. Which have also been up and operating for months.
Logistics. Are easy. Spam buy, load up carrier, send to gate, issue orders. I am replacing maybe one fighter on a really heavy gate every 4-5 days. I have several hundred fighters sat around waiting to be placed if required. It's enough to last me basically forever.
And for cost. My blockades cost less than yours. You are using 4 M2s? So at minimum 400million. Probly more like 500-600 million due to bits and pieces. Ok you capped your M2s, but for me the time investment is even worse than the credit investment. And it doesn't change the value of the assets used. I could basically go and cap the same number of M2s, sell most of them, set up my blockade and still have a lot of credits left over. The LTs are also not free. When you could be selling them. Yes they are cheaper than most fighters, but also much poorer performing. I'd rather use M5s. I at least I can issue orders to them effectively.
My blockade fleets cost in the region of 200-300 million per gate tops. Even if I include the trade station I have taken to using in hotspots. I could probably reduce the cost by using cheaper fighters, but I dont need to so I don't.
I also don't need to imagine the task of buying, equiping and deploying thousands of ships. Been there, done that, got the t-shirt

As you say tho, different strokes for different strokes. But I maintain nothing is proven in favour of using LTs. Unless you are using Gazz's ring of fire script. Then you could have a point.