Because some are ____________________  alternatives, although poor at it.  

Too often.

When I need one.

A battery that has to be replaced every couple of years.  

The thicker the straight-ended strap, the more impossible it is to fit on the watch in question.  Geometry.

Looks like a good source for some watches. I will keep them in mind.

 I see none of them is 23mm - the lug width on the watch that I asked about - the Citizen Blue Angels’ World Chronograph A-T  AT8020-03L?  23mm.  Concave strap ends ends where they attach to the watch with curved spring bars.  Little room for a strap with straight ends due to the position of Sporing bar holes,  placed assuming concave ends and spring bars - curve around curve of case.

What did you do for spring bars?  

Any clue on the model number or listed name?   My pin holes seem closer to the case.