Holders of certain passports are granted visas on arrival because their countries’ passports are inherently more secure than those from poorer nations.

There is no comparing a Pakistani passport for a US one, as an example

The last time I checked, a Qatari passport didn’t contain a biometric chip, floating holographic images, micro printing, UV light waves, translucent laminates, complex watermarks, micro offset printing, and the other features that are now standard in passports from affluent countries.

If Qataris are expecting to get visas on arrival in western countries they could start by producing quality, world standard passports, not the library card style ones they currently use, which are easily forged.