I have read somewhere similar point of view and I totally agree with what you said. However, there are also some other things could be mentioned on this topic, but overall I like what you described.
In this website there is also a lot of interesting and useful information:
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The sci-fi-london 48hr film challenge was started in 2008 and has had over 1400 short films made since then. The quality of the films created is amazing and proves that you can make engaging science fiction film on low to no budget. Thank you to all those who have taken part.