Game development is an extremely competitive market, and as a game developer there is probably already a lot on your plate. From finding the best way to monetize your game which can include an app review service, using in-app purchases for a payment model, publishing the game as a paid app and other factors. One thing that shouldn't be avoided when considering what steps in the development process need to be made is what engine to build your game with, and choosing the right one can have a profound effect on what platforms your game is compatible with, and ultimately could mean more people your game is reaching if more platforms support it. More gamers playing your game is a good thing.
This is a big reason why so many game developers are choosing to back Unity during the development process and build games with the Unity engine. The simple reason that it has multi-platform support can mean casting a wider net for your game, causing it to potentially reach more hands. Choosing something like Unity which supports multiple platforms also means there's a good chance you'll have less hassle if you want to create your game for multiple platforms, because you won't have to use a different game engine for every single one.
Unity is doing its part to keep things as simple as possible and make sure that game developers can save time thanks to the high-level programming language C#. It already has many of the tools and elements available for the development process, so developers just need to utilize what's in front of them. Cross-platform integration is already there, so one person or one team can focus on development of the game for each platform they wish using the same engine and the same programming language with little changes to the code for different platforms. In the long run, this choice to develop with Unity instead of another engine can benefit the gamers too. With developers being able to save time during the development process, less time can be spent coding and more time can be devoted to bringing the gamer a quality and enjoyable experience. At the core of things, more happy gamers can mean more engagement for your game, which could mean a more successful product and more profit.