🎞️ Trailers now show the whole film, so why do I still go?

I watched the trailer of a thriller last month and it showed the opening, the twist, the final fight and the second half song. Then I went to the theatre anyway, and I knew everything before the first scene was done. The strange part is that I was still sitting there thinking something new might come up. It did not. Two years ago a trailer used to stop before the interval. You got the mood, the music and a couple of faces. Now it is a two and a half minute summary with a voice over. I asked my cousin, who works at a marketing agency in Madhapur, and he said producers want people to book early, so they put everything in. He did not look happy saying it. I now close my eyes for the last thirty seconds of any trailer. It is a small thing, but it has saved a couple of films for me. Has anyone else started avoiding trailers altogether? What do you do to protect the surprise?

The Bollywood ones are the worst, they give the entire song list and the villain's name. A Telugu trailer I saw last week stopped before the interval, and I was surprised how good that felt. I scroll past any trailer that crosses two minutes now. Closing your eyes for the last thirty seconds is clever, I will try that, though I usually end up opening one eye.

I stopped watching trailers about a year ago and I do not miss them. Now I only read the title and the cast, then walk in with no idea. The last two films I watched this way felt like new releases again, with surprises I had not seen coming. Your cousin's answer is probably right, but there should be a rule that the last third of the story stays hidden. Who would agree?