I don’t think it is factoring the charger port not included.
Random example (HP Probook)
That is cost for everything.
Then the lowest cost 45W Anker port currently
So you’re going to need that 45W PD port for some other reason, such as you’re carrying the laptop and a larger tablet or a 45W Powercore, and alternating using them to move the cable over. I often see professionals with both corp laptop and personal device, so I can envisage some benefit.