By that logic why not cut Nathan drake and sackboy so, they've only been around a full gen. Why not just go with Spyro and Crash as they've been there since the start. Yes Aloy can qualify as a mascot in the same way Master chief did right off the bat for Xbox after only one game or how crash did for Ps1 straightafter the first game. She has been alongside the faces of advertising since the gamr released and continues to be there.
Both Drake and Sackboy have appeared on multiple consoles (at least 3) and have had 4 or five games at least each. They have become iconic over the past decade as well as featured in much of the brand advertising, and this is the difference.
Alloy is great, but she was only in one game, on one console, little over a year ago. We have no idea how the IP will develop and significant amount of time would be required before we can see if she would truly qualify. All others on the list have had that significant amount of time to make their mark, and they have.
Having one good game does not qualify representation of the entire Playstation legacy. I am sorry, but that is just how it is.
To those saying Spiderman, he has been multiplatform until this one game. I cannot see him as a Playstation mascot either.
To those saying no one fits the bill, lighten up...that is low hanging fruit. We are looking at who MOST fits the bill, not an end all be all of who the mascot is.