Same reason “clothes” cannot be considered standardized. Someone will think standard is jeans and T-shirt, for others it’s a suit, and for others a dress, some will change clothes regularly, and others will only wear Nike shoes. If you try to define what everyone should wear you’ll get people pissed off, and they will still wear what they want.

Because linux doesn’t have an “ecosystem”. You have to either make your existing ecosystem work with linux or center your ecosystem around apps and things that work with linux. I do that and I’d say it’s more standardized than both the windows and the mac ones…