I couldn't disagree more. Owning just one makes your life unnecessarily unpleasant unless it's a floor pump and you use CO2 cartridges for roadside repairs (which will leave you stranded if you embed a small piece of tire belt wire in a tire which you can't find producing a slow leak in every replacement tube you try which also can't be found to patch), or it's a full sized frame pump and you use an air compressor at home.

A floor pump takes few easy strokes to get back to riding pressure from normal leakage, and 15-30 starting from zero.

A full-sized frame pump can get to 90 PSI in 90-100 strokes, but takes a lot more effort than a floor pump.

A mini-pump is a 200-300+ stroke ordeal

Best mini pumps for road cyclists - BikeRadar USA
As good as it gets:
Lezyne Road Drive Mini - Pressure at 200 strokes: 70-80psi

Pocket sized:
Axiom Blastair HPS (pocket sized and therefore bad) - Pressure at 200 strokes: 40-45psi "We reached somewhere around 45psi after 200 strokes, but even at this point the pump’s tiny locking lever was struggling to keep the chuck on the Presta valve."

Crank Brothers Sterling Short - Pressure at 200 strokes: 50-55psi "It had reached 50–55psi after 200 strokes, and had managed around 70psi after another 100. We kept going, but anything above 80psi will be a biceps-busting effort, and even 80psi left us with aching arms."