Need to rush off but, I liked the post. Quick response....
Stretching is good if you need it. Useless if you don't.
Babies/toddlers don't stretch, they just use the ROM they have....
Plenty of people have restricted ROM because the brain puts the brakes on the muscles. The brain says "stop" because it senses a threat (of falling over). This situation can cause a feeling of tightness. "tight" can mean anything. It's just a feeling, though, nothing more. It may call for stretching and it may not. Hamstrings a great example as the majority of the time they don't need stretched.
why do I get the feeling that tomorrow somebody is going to write a very long post on this subject?
As usual Kenny, we will be all ears.