That said, the traditional texts are still hard to parse. I’ve considered writing a manual-to-the-manual of sorts that explains the same concepts but in a modern way. I should mention that Leigh Brasington has some really awesome content out there (videos, books, and articles). I am not a master meditator, but if that sort of a thing exists, Leigh is.
But as you have said there are many more techniques. I've heard the breath called a relatively difficult meditation object for beginners.
But you have to make the effort of reading the books (or finding a competent teacher) and then practicing the techniques hard enough and long enough for a fair appraisal. 10 minutes a day of instructions from Headspace is predictably useless. You can write it off at that if you like, but it would be like pumping a dumbbell for two reps a day and concluding that weightlifting is useless as exercise.