No. Not needed. Don`t spread misinformation when you don`t know everything on a topic.
I think we are all guilty of overgeneralizations... you, NEO158, and myself.
As is always the case with any computing related question, the only correct answer is: "it depends".
For AOSP device users (which is the dominant Android flavour in use), who lack access to the Play store, people without anti-virus software are clearly asking for trouble. Most of us westerners have difficulty grasping just how different Russian's and Chinese' Android related security experiences are from our own.
Nevertheless, even us westerners would be well advised to use malware protection software if we decide to side load apps. Then I'd say
it is needed.
If an Android device is used to store or access sensitive/confidential data, and the user is simultaneously an app junkie that downloads and experiments with many apps, then I'd also say
it is needed. Better yet, don't even use the same device for these two tasks, but that isn't always possible.
My point is that it really depends on how each of us use our devices and what the consequences of an infection would be. Often times, infection is a theoretical threat that is so small I'd say it is safe to ignore, other times it isn't.
I also think it is fair to acknowledge that Android and WP definitely have differences as far as security is concerned. I think that was basically Neo158's main point.
For example, there will always exist some subtle forms of Android malware, that will always slip past Google's protection systems. Anti-virus software won't detect them either, no matter how good they are. One example are the wallpaper apps that were recently discovered in the Play Store. These apps "hijack" a user's device to do bitcoin mining. These apps don't need access to anything on the device to misuse it. They don't steal anything. They cause no harm to your data. All the user will notice is a decrease in battery life and poorer performance. These types of apps are unique to Android due to the platform's flexibility. The more restricted nature of WP and iOS simply wouldn't allow that type of app to function. The good thing about Android, from a malware writers point of view, is that once your malware is able to get itself installed, it is able to do almost anything. In that sense Android is a malware writers wet dream.
Here my point is that although Android's popularity certainly is the main reason it is a preferred targeted for malware developers, that is not the only reason!
In summary, it is correct to acknowledge that Android has more security related issues to deal with than both iOS and WP, but there is no need to overdramatize the risk, particularly not for westerners who are typically hooked up to the Play store.