I disagree, it is not usefull when you have a lamp which takes only short cells.

I had a Utorch UT01 it takes only unprotected 14500, a typical protected 14500 is too long.

But there are a few protected which fit. eg. Xtar 14500 is only 0,3mm longer

Filtering about real length is verry appreciated.

I think we get similar problems with protected 21700 (tight tube, battery too long) I don’t have the impression manufacturers have already settled on tube dimensions.