15 minutes? I take my wheel all the way off and patch a tube in much less time than that so what's the big deal of removing the wheel?

Not to mention you can not always find the hole in a tube if it is still in the tire. Not all punctures are picture perfect thorns.

I set my chain in a certain position to make wheel removal easy. Technique getting the wheel off without touching the derailleur, setting tire label to valve stem to help locate the puncture causing culprit.

All this helps to make a repair efficient and no way would it take me 15 minutes.

I've been riding for 23 consistent years, my share of flats over time and if you can find a small pinhole in a tube without removing the tire from the wheel "every time", you're one lucky MOFO!