We need to recognize that physics is part of the design of a flashlight. We can either have a small, lightweight, high powered flashlight for 1 minute, or we can have a heavy duty flashlight that needs a shoulder strap that will run on high until the batteries are dead.
It's a question of the ratio of power vs mass. If you want a high powered small flashlight, physics demands that you use it more or less momentarily on high. It's still a very useful flashlight. We just need to know how to use those kind. They are meant for low and medium normal work, with the occasional burst to checkout some detail at range.
The problem arises when a user, without knowledge, purchases a flashlight with the wrong expectations.